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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
e594a3b1 LP |
2 | |
3 | #if HAVE_VALGRIND_MEMCHECK_H | |
4 | #include <valgrind/memcheck.h> | |
5 | #endif | |
6 | ||
7 | #include <fcntl.h> | |
8 | #include <getopt.h> | |
9 | #include <libfdisk.h> | |
10 | #include <linux/fs.h> | |
11 | #include <linux/loop.h> | |
12 | #include <sys/file.h> | |
13 | #include <sys/ioctl.h> | |
14 | #include <sys/stat.h> | |
15 | ||
16 | #include <openssl/hmac.h> | |
17 | #include <openssl/sha.h> | |
18 | ||
19 | #include "sd-id128.h" | |
20 | ||
21 | #include "alloc-util.h" | |
22 | #include "blkid-util.h" | |
23 | #include "blockdev-util.h" | |
24 | #include "btrfs-util.h" | |
25 | #include "conf-files.h" | |
26 | #include "conf-parser.h" | |
1e2f3230 | 27 | #include "cryptsetup-util.h" |
e594a3b1 LP |
28 | #include "def.h" |
29 | #include "efivars.h" | |
30 | #include "errno-util.h" | |
31 | #include "fd-util.h" | |
b9df3536 | 32 | #include "fileio.h" |
e594a3b1 LP |
33 | #include "format-table.h" |
34 | #include "format-util.h" | |
35 | #include "fs-util.h" | |
36 | #include "gpt.h" | |
37 | #include "id128-util.h" | |
a015fbe7 | 38 | #include "json.h" |
e594a3b1 LP |
39 | #include "list.h" |
40 | #include "locale-util.h" | |
53171c04 | 41 | #include "loop-util.h" |
e594a3b1 | 42 | #include "main-func.h" |
8a794850 | 43 | #include "mkdir.h" |
53171c04 | 44 | #include "mkfs-util.h" |
8a794850 | 45 | #include "mount-util.h" |
e594a3b1 LP |
46 | #include "parse-util.h" |
47 | #include "path-util.h" | |
48 | #include "pretty-print.h" | |
49 | #include "proc-cmdline.h" | |
8a794850 | 50 | #include "process-util.h" |
b9df3536 | 51 | #include "random-util.h" |
170c9823 | 52 | #include "resize-fs.h" |
e594a3b1 | 53 | #include "sort-util.h" |
e031166e | 54 | #include "specifier.h" |
e594a3b1 LP |
55 | #include "stat-util.h" |
56 | #include "stdio-util.h" | |
57 | #include "string-util.h" | |
58 | #include "strv.h" | |
59 | #include "terminal-util.h" | |
8a794850 | 60 | #include "user-util.h" |
e594a3b1 LP |
61 | #include "utf8.h" |
62 | ||
fb08381c LP |
63 | /* If not configured otherwise use a minimal partition size of 10M */ |
64 | #define DEFAULT_MIN_SIZE (10*1024*1024) | |
65 | ||
66 | /* Hard lower limit for new partition sizes */ | |
67 | #define HARD_MIN_SIZE 4096 | |
68 | ||
69e3234d | 69 | /* libfdisk takes off slightly more than 1M of the disk size when creating a GPT disk label */ |
170c9823 LP |
70 | #define GPT_METADATA_SIZE (1044*1024) |
71 | ||
72 | /* LUKS2 takes off 16M of the partition size with its metadata by default */ | |
73 | #define LUKS2_METADATA_SIZE (16*1024*1024) | |
74 | ||
3dd8ae5c | 75 | #if !HAVE_LIBCRYPTSETUP |
76 | struct crypt_device; | |
77 | static inline void sym_crypt_free(struct crypt_device* cd) {} | |
78 | static inline void sym_crypt_freep(struct crypt_device** cd) {} | |
79 | #endif | |
80 | ||
e594a3b1 LP |
81 | /* Note: When growing and placing new partitions we always align to 4K sector size. It's how newer hard disks |
82 | * are designed, and if everything is aligned to that performance is best. And for older hard disks with 512B | |
83 | * sector size devices were generally assumed to have an even number of sectors, hence at the worst we'll | |
84 | * waste 3K per partition, which is probably fine. */ | |
85 | ||
86 | static enum { | |
87 | EMPTY_REFUSE, /* refuse empty disks, never create a partition table */ | |
88 | EMPTY_ALLOW, /* allow empty disks, create partition table if necessary */ | |
89 | EMPTY_REQUIRE, /* require an empty disk, create a partition table */ | |
90 | EMPTY_FORCE, /* make disk empty, erase everything, create a partition table always */ | |
a26f4a49 | 91 | EMPTY_CREATE, /* create disk as loopback file, create a partition table always */ |
e594a3b1 LP |
92 | } arg_empty = EMPTY_REFUSE; |
93 | ||
94 | static bool arg_dry_run = true; | |
95 | static const char *arg_node = NULL; | |
96 | static char *arg_root = NULL; | |
97 | static char *arg_definitions = NULL; | |
98 | static bool arg_discard = true; | |
99 | static bool arg_can_factory_reset = false; | |
100 | static int arg_factory_reset = -1; | |
101 | static sd_id128_t arg_seed = SD_ID128_NULL; | |
102 | static bool arg_randomize = false; | |
103 | static int arg_pretty = -1; | |
a26f4a49 | 104 | static uint64_t arg_size = UINT64_MAX; |
170c9823 | 105 | static bool arg_size_auto = false; |
a015fbe7 TH |
106 | static bool arg_json = false; |
107 | static JsonFormatFlags arg_json_format_flags = 0; | |
b9df3536 LP |
108 | static void *arg_key = NULL; |
109 | static size_t arg_key_size = 0; | |
e594a3b1 LP |
110 | |
111 | STATIC_DESTRUCTOR_REGISTER(arg_root, freep); | |
112 | STATIC_DESTRUCTOR_REGISTER(arg_definitions, freep); | |
b9df3536 | 113 | STATIC_DESTRUCTOR_REGISTER(arg_key, erase_and_freep); |
e594a3b1 LP |
114 | |
115 | typedef struct Partition Partition; | |
116 | typedef struct FreeArea FreeArea; | |
117 | typedef struct Context Context; | |
118 | ||
119 | struct Partition { | |
120 | char *definition_path; | |
121 | ||
122 | sd_id128_t type_uuid; | |
123 | sd_id128_t current_uuid, new_uuid; | |
124 | char *current_label, *new_label; | |
125 | ||
126 | bool dropped; | |
127 | bool factory_reset; | |
128 | int32_t priority; | |
129 | ||
130 | uint32_t weight, padding_weight; | |
131 | ||
132 | uint64_t current_size, new_size; | |
133 | uint64_t size_min, size_max; | |
134 | ||
135 | uint64_t current_padding, new_padding; | |
136 | uint64_t padding_min, padding_max; | |
137 | ||
138 | uint64_t partno; | |
139 | uint64_t offset; | |
140 | ||
141 | struct fdisk_partition *current_partition; | |
142 | struct fdisk_partition *new_partition; | |
143 | FreeArea *padding_area; | |
144 | FreeArea *allocated_to_area; | |
145 | ||
757bc2e4 LP |
146 | char *copy_blocks_path; |
147 | int copy_blocks_fd; | |
148 | uint64_t copy_blocks_size; | |
149 | ||
53171c04 | 150 | char *format; |
8a794850 | 151 | char **copy_files; |
b9df3536 | 152 | bool encrypt; |
53171c04 | 153 | |
e594a3b1 LP |
154 | LIST_FIELDS(Partition, partitions); |
155 | }; | |
156 | ||
157 | #define PARTITION_IS_FOREIGN(p) (!(p)->definition_path) | |
158 | #define PARTITION_EXISTS(p) (!!(p)->current_partition) | |
159 | ||
160 | struct FreeArea { | |
161 | Partition *after; | |
162 | uint64_t size; | |
163 | uint64_t allocated; | |
164 | }; | |
165 | ||
166 | struct Context { | |
167 | LIST_HEAD(Partition, partitions); | |
168 | size_t n_partitions; | |
169 | ||
170 | FreeArea **free_areas; | |
171 | size_t n_free_areas, n_allocated_free_areas; | |
172 | ||
173 | uint64_t start, end, total; | |
174 | ||
175 | struct fdisk_context *fdisk_context; | |
176 | ||
177 | sd_id128_t seed; | |
178 | }; | |
179 | ||
180 | static uint64_t round_down_size(uint64_t v, uint64_t p) { | |
181 | return (v / p) * p; | |
182 | } | |
183 | ||
184 | static uint64_t round_up_size(uint64_t v, uint64_t p) { | |
185 | ||
186 | v = DIV_ROUND_UP(v, p); | |
187 | ||
188 | if (v > UINT64_MAX / p) | |
189 | return UINT64_MAX; /* overflow */ | |
190 | ||
191 | return v * p; | |
192 | } | |
193 | ||
194 | static Partition *partition_new(void) { | |
195 | Partition *p; | |
196 | ||
197 | p = new(Partition, 1); | |
198 | if (!p) | |
199 | return NULL; | |
200 | ||
201 | *p = (Partition) { | |
202 | .weight = 1000, | |
203 | .padding_weight = 0, | |
204 | .current_size = UINT64_MAX, | |
205 | .new_size = UINT64_MAX, | |
206 | .size_min = UINT64_MAX, | |
207 | .size_max = UINT64_MAX, | |
208 | .current_padding = UINT64_MAX, | |
209 | .new_padding = UINT64_MAX, | |
210 | .padding_min = UINT64_MAX, | |
211 | .padding_max = UINT64_MAX, | |
212 | .partno = UINT64_MAX, | |
213 | .offset = UINT64_MAX, | |
757bc2e4 LP |
214 | .copy_blocks_fd = -1, |
215 | .copy_blocks_size = UINT64_MAX, | |
e594a3b1 LP |
216 | }; |
217 | ||
218 | return p; | |
219 | } | |
220 | ||
221 | static Partition* partition_free(Partition *p) { | |
222 | if (!p) | |
223 | return NULL; | |
224 | ||
225 | free(p->current_label); | |
226 | free(p->new_label); | |
227 | free(p->definition_path); | |
228 | ||
229 | if (p->current_partition) | |
230 | fdisk_unref_partition(p->current_partition); | |
231 | if (p->new_partition) | |
232 | fdisk_unref_partition(p->new_partition); | |
233 | ||
757bc2e4 LP |
234 | free(p->copy_blocks_path); |
235 | safe_close(p->copy_blocks_fd); | |
236 | ||
53171c04 | 237 | free(p->format); |
8a794850 | 238 | strv_free(p->copy_files); |
53171c04 | 239 | |
e594a3b1 LP |
240 | return mfree(p); |
241 | } | |
242 | ||
243 | static Partition* partition_unlink_and_free(Context *context, Partition *p) { | |
244 | if (!p) | |
245 | return NULL; | |
246 | ||
247 | LIST_REMOVE(partitions, context->partitions, p); | |
248 | ||
249 | assert(context->n_partitions > 0); | |
250 | context->n_partitions--; | |
251 | ||
252 | return partition_free(p); | |
253 | } | |
254 | ||
255 | DEFINE_TRIVIAL_CLEANUP_FUNC(Partition*, partition_free); | |
256 | ||
257 | static Context *context_new(sd_id128_t seed) { | |
258 | Context *context; | |
259 | ||
260 | context = new(Context, 1); | |
261 | if (!context) | |
262 | return NULL; | |
263 | ||
264 | *context = (Context) { | |
265 | .start = UINT64_MAX, | |
266 | .end = UINT64_MAX, | |
267 | .total = UINT64_MAX, | |
268 | .seed = seed, | |
269 | }; | |
270 | ||
271 | return context; | |
272 | } | |
273 | ||
274 | static void context_free_free_areas(Context *context) { | |
275 | assert(context); | |
276 | ||
277 | for (size_t i = 0; i < context->n_free_areas; i++) | |
278 | free(context->free_areas[i]); | |
279 | ||
280 | context->free_areas = mfree(context->free_areas); | |
281 | context->n_free_areas = 0; | |
282 | context->n_allocated_free_areas = 0; | |
283 | } | |
284 | ||
285 | static Context *context_free(Context *context) { | |
286 | if (!context) | |
287 | return NULL; | |
288 | ||
289 | while (context->partitions) | |
290 | partition_unlink_and_free(context, context->partitions); | |
291 | assert(context->n_partitions == 0); | |
292 | ||
293 | context_free_free_areas(context); | |
294 | ||
295 | if (context->fdisk_context) | |
296 | fdisk_unref_context(context->fdisk_context); | |
297 | ||
298 | return mfree(context); | |
299 | } | |
300 | ||
301 | DEFINE_TRIVIAL_CLEANUP_FUNC(Context*, context_free); | |
302 | ||
303 | static int context_add_free_area( | |
304 | Context *context, | |
305 | uint64_t size, | |
306 | Partition *after) { | |
307 | ||
308 | FreeArea *a; | |
309 | ||
310 | assert(context); | |
311 | assert(!after || !after->padding_area); | |
312 | ||
313 | if (!GREEDY_REALLOC(context->free_areas, context->n_allocated_free_areas, context->n_free_areas + 1)) | |
314 | return -ENOMEM; | |
315 | ||
316 | a = new(FreeArea, 1); | |
317 | if (!a) | |
318 | return -ENOMEM; | |
319 | ||
320 | *a = (FreeArea) { | |
321 | .size = size, | |
322 | .after = after, | |
323 | }; | |
324 | ||
325 | context->free_areas[context->n_free_areas++] = a; | |
326 | ||
327 | if (after) | |
328 | after->padding_area = a; | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static bool context_drop_one_priority(Context *context) { | |
334 | int32_t priority = 0; | |
335 | Partition *p; | |
336 | bool exists = false; | |
337 | ||
338 | LIST_FOREACH(partitions, p, context->partitions) { | |
339 | if (p->dropped) | |
340 | continue; | |
341 | if (p->priority < priority) | |
342 | continue; | |
343 | if (p->priority == priority) { | |
344 | exists = exists || PARTITION_EXISTS(p); | |
345 | continue; | |
346 | } | |
347 | ||
348 | priority = p->priority; | |
349 | exists = PARTITION_EXISTS(p); | |
350 | } | |
351 | ||
352 | /* Refuse to drop partitions with 0 or negative priorities or partitions of priorities that have at | |
353 | * least one existing priority */ | |
354 | if (priority <= 0 || exists) | |
355 | return false; | |
356 | ||
357 | LIST_FOREACH(partitions, p, context->partitions) { | |
358 | if (p->priority < priority) | |
359 | continue; | |
360 | ||
361 | if (p->dropped) | |
362 | continue; | |
363 | ||
364 | p->dropped = true; | |
365 | log_info("Can't fit partition %s of priority %" PRIi32 ", dropping.", p->definition_path, p->priority); | |
366 | } | |
367 | ||
368 | return true; | |
369 | } | |
370 | ||
371 | static uint64_t partition_min_size(const Partition *p) { | |
372 | uint64_t sz; | |
373 | ||
374 | /* Calculate the disk space we really need at minimum for this partition. If the partition already | |
375 | * exists the current size is what we really need. If it doesn't exist yet refuse to allocate less | |
fb08381c LP |
376 | * than 4K. |
377 | * | |
378 | * DEFAULT_MIN_SIZE is the default SizeMin= we configure if nothing else is specified. */ | |
e594a3b1 LP |
379 | |
380 | if (PARTITION_IS_FOREIGN(p)) { | |
381 | /* Don't allow changing size of partitions not managed by us */ | |
382 | assert(p->current_size != UINT64_MAX); | |
383 | return p->current_size; | |
384 | } | |
385 | ||
fb08381c | 386 | sz = p->current_size != UINT64_MAX ? p->current_size : HARD_MIN_SIZE; |
757bc2e4 | 387 | |
170c9823 LP |
388 | if (!PARTITION_EXISTS(p)) { |
389 | uint64_t d = 0; | |
390 | ||
391 | if (p->encrypt) | |
392 | d += round_up_size(LUKS2_METADATA_SIZE, 4096); | |
393 | ||
394 | if (p->copy_blocks_size != UINT64_MAX) | |
395 | d += round_up_size(p->copy_blocks_size, 4096); | |
396 | else if (p->format || p->encrypt) { | |
397 | uint64_t f; | |
398 | ||
399 | /* If we shall synthesize a file system, take minimal fs size into account (assumed to be 4K if not known) */ | |
400 | f = p->format ? minimal_size_by_fs_name(p->format) : UINT64_MAX; | |
401 | d += f == UINT64_MAX ? 4096 : f; | |
402 | } | |
403 | ||
404 | if (d > sz) | |
405 | sz = d; | |
406 | } | |
757bc2e4 LP |
407 | |
408 | return MAX(p->size_min != UINT64_MAX ? p->size_min : DEFAULT_MIN_SIZE, sz); | |
e594a3b1 LP |
409 | } |
410 | ||
411 | static uint64_t partition_max_size(const Partition *p) { | |
412 | /* Calculate how large the partition may become at max. This is generally the configured maximum | |
413 | * size, except when it already exists and is larger than that. In that case it's the existing size, | |
414 | * since we never want to shrink partitions. */ | |
415 | ||
416 | if (PARTITION_IS_FOREIGN(p)) { | |
417 | /* Don't allow changing size of partitions not managed by us */ | |
418 | assert(p->current_size != UINT64_MAX); | |
419 | return p->current_size; | |
420 | } | |
421 | ||
422 | if (p->current_size != UINT64_MAX) | |
423 | return MAX(p->current_size, p->size_max); | |
424 | ||
425 | return p->size_max; | |
426 | } | |
427 | ||
428 | static uint64_t partition_min_size_with_padding(const Partition *p) { | |
429 | uint64_t sz; | |
430 | ||
431 | /* Calculate the disk space we need for this partition plus any free space coming after it. This | |
432 | * takes user configured padding into account as well as any additional whitespace needed to align | |
433 | * the next partition to 4K again. */ | |
434 | ||
435 | sz = partition_min_size(p); | |
436 | ||
437 | if (p->padding_min != UINT64_MAX) | |
438 | sz += p->padding_min; | |
439 | ||
440 | if (PARTITION_EXISTS(p)) { | |
441 | /* If the partition wasn't aligned, add extra space so that any we might add will be aligned */ | |
442 | assert(p->offset != UINT64_MAX); | |
443 | return round_up_size(p->offset + sz, 4096) - p->offset; | |
444 | } | |
445 | ||
446 | /* If this is a new partition we'll place it aligned, hence we just need to round up the required size here */ | |
447 | return round_up_size(sz, 4096); | |
448 | } | |
449 | ||
450 | static uint64_t free_area_available(const FreeArea *a) { | |
451 | assert(a); | |
452 | ||
453 | /* Determines how much of this free area is not allocated yet */ | |
454 | ||
455 | assert(a->size >= a->allocated); | |
456 | return a->size - a->allocated; | |
457 | } | |
458 | ||
459 | static uint64_t free_area_available_for_new_partitions(const FreeArea *a) { | |
460 | uint64_t avail; | |
461 | ||
462 | /* Similar to free_area_available(), but takes into account that the required size and padding of the | |
162392b7 | 463 | * preceding partition is honoured. */ |
e594a3b1 LP |
464 | |
465 | avail = free_area_available(a); | |
466 | if (a->after) { | |
467 | uint64_t need, space; | |
468 | ||
469 | need = partition_min_size_with_padding(a->after); | |
470 | ||
471 | assert(a->after->offset != UINT64_MAX); | |
472 | assert(a->after->current_size != UINT64_MAX); | |
473 | ||
474 | space = round_up_size(a->after->offset + a->after->current_size, 4096) - a->after->offset + avail; | |
475 | if (need >= space) | |
476 | return 0; | |
477 | ||
478 | return space - need; | |
479 | } | |
480 | ||
481 | return avail; | |
482 | } | |
483 | ||
484 | static int free_area_compare(FreeArea *const *a, FreeArea *const*b) { | |
485 | return CMP(free_area_available_for_new_partitions(*a), | |
486 | free_area_available_for_new_partitions(*b)); | |
487 | } | |
488 | ||
489 | static uint64_t charge_size(uint64_t total, uint64_t amount) { | |
490 | uint64_t rounded; | |
491 | ||
492 | assert(amount <= total); | |
493 | ||
494 | /* Subtract the specified amount from total, rounding up to multiple of 4K if there's room */ | |
495 | rounded = round_up_size(amount, 4096); | |
496 | if (rounded >= total) | |
497 | return 0; | |
498 | ||
499 | return total - rounded; | |
500 | } | |
501 | ||
502 | static uint64_t charge_weight(uint64_t total, uint64_t amount) { | |
503 | assert(amount <= total); | |
504 | return total - amount; | |
505 | } | |
506 | ||
507 | static bool context_allocate_partitions(Context *context) { | |
508 | Partition *p; | |
509 | ||
510 | assert(context); | |
511 | ||
512 | /* A simple first-fit algorithm, assuming the array of free areas is sorted by size in decreasing | |
513 | * order. */ | |
514 | ||
515 | LIST_FOREACH(partitions, p, context->partitions) { | |
516 | bool fits = false; | |
517 | uint64_t required; | |
518 | FreeArea *a = NULL; | |
519 | ||
520 | /* Skip partitions we already dropped or that already exist */ | |
521 | if (p->dropped || PARTITION_EXISTS(p)) | |
522 | continue; | |
523 | ||
524 | /* Sort by size */ | |
525 | typesafe_qsort(context->free_areas, context->n_free_areas, free_area_compare); | |
526 | ||
527 | /* How much do we need to fit? */ | |
528 | required = partition_min_size_with_padding(p); | |
529 | assert(required % 4096 == 0); | |
530 | ||
531 | for (size_t i = 0; i < context->n_free_areas; i++) { | |
532 | a = context->free_areas[i]; | |
533 | ||
534 | if (free_area_available_for_new_partitions(a) >= required) { | |
535 | fits = true; | |
536 | break; | |
537 | } | |
538 | } | |
539 | ||
540 | if (!fits) | |
541 | return false; /* 😢 Oh no! We can't fit this partition into any free area! */ | |
542 | ||
543 | /* Assign the partition to this free area */ | |
544 | p->allocated_to_area = a; | |
545 | ||
546 | /* Budget the minimal partition size */ | |
547 | a->allocated += required; | |
548 | } | |
549 | ||
550 | return true; | |
551 | } | |
552 | ||
553 | static int context_sum_weights(Context *context, FreeArea *a, uint64_t *ret) { | |
554 | uint64_t weight_sum = 0; | |
555 | Partition *p; | |
556 | ||
557 | assert(context); | |
558 | assert(a); | |
559 | assert(ret); | |
560 | ||
561 | /* Determine the sum of the weights of all partitions placed in or before the specified free area */ | |
562 | ||
563 | LIST_FOREACH(partitions, p, context->partitions) { | |
564 | if (p->padding_area != a && p->allocated_to_area != a) | |
565 | continue; | |
566 | ||
567 | if (p->weight > UINT64_MAX - weight_sum) | |
568 | goto overflow_sum; | |
569 | weight_sum += p->weight; | |
570 | ||
571 | if (p->padding_weight > UINT64_MAX - weight_sum) | |
572 | goto overflow_sum; | |
573 | weight_sum += p->padding_weight; | |
574 | } | |
575 | ||
576 | *ret = weight_sum; | |
577 | return 0; | |
578 | ||
579 | overflow_sum: | |
580 | return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "Combined weight of partition exceeds unsigned 64bit range, refusing."); | |
581 | } | |
582 | ||
583 | static int scale_by_weight(uint64_t value, uint64_t weight, uint64_t weight_sum, uint64_t *ret) { | |
584 | assert(weight_sum >= weight); | |
585 | assert(ret); | |
586 | ||
587 | if (weight == 0) { | |
588 | *ret = 0; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | if (value > UINT64_MAX / weight) | |
593 | return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "Scaling by weight of partition exceeds unsigned 64bit range, refusing."); | |
594 | ||
595 | *ret = value * weight / weight_sum; | |
596 | return 0; | |
597 | } | |
598 | ||
599 | typedef enum GrowPartitionPhase { | |
600 | /* The first phase: we charge partitions which need more (according to constraints) than their weight-based share. */ | |
601 | PHASE_OVERCHARGE, | |
602 | ||
603 | /* The second phase: we charge partitions which need less (according to constraints) than their weight-based share. */ | |
604 | PHASE_UNDERCHARGE, | |
605 | ||
606 | /* The third phase: we distribute what remains among the remaining partitions, according to the weights */ | |
607 | PHASE_DISTRIBUTE, | |
608 | } GrowPartitionPhase; | |
609 | ||
610 | static int context_grow_partitions_phase( | |
611 | Context *context, | |
612 | FreeArea *a, | |
613 | GrowPartitionPhase phase, | |
614 | uint64_t *span, | |
615 | uint64_t *weight_sum) { | |
616 | ||
617 | Partition *p; | |
618 | int r; | |
619 | ||
620 | assert(context); | |
621 | assert(a); | |
622 | ||
623 | /* Now let's look at the intended weights and adjust them taking the minimum space assignments into | |
624 | * account. i.e. if a partition has a small weight but a high minimum space value set it should not | |
625 | * get any additional room from the left-overs. Similar, if two partitions have the same weight they | |
626 | * should get the same space if possible, even if one has a smaller minimum size than the other. */ | |
627 | LIST_FOREACH(partitions, p, context->partitions) { | |
628 | ||
629 | /* Look only at partitions associated with this free area, i.e. immediately | |
162392b7 | 630 | * preceding it, or allocated into it */ |
e594a3b1 LP |
631 | if (p->allocated_to_area != a && p->padding_area != a) |
632 | continue; | |
633 | ||
634 | if (p->new_size == UINT64_MAX) { | |
635 | bool charge = false, try_again = false; | |
636 | uint64_t share, rsz, xsz; | |
637 | ||
638 | /* Calculate how much this space this partition needs if everyone would get | |
639 | * the weight based share */ | |
640 | r = scale_by_weight(*span, p->weight, *weight_sum, &share); | |
641 | if (r < 0) | |
642 | return r; | |
643 | ||
644 | rsz = partition_min_size(p); | |
645 | xsz = partition_max_size(p); | |
646 | ||
647 | if (phase == PHASE_OVERCHARGE && rsz > share) { | |
648 | /* This partition needs more than its calculated share. Let's assign | |
649 | * it that, and take this partition out of all calculations and start | |
650 | * again. */ | |
651 | ||
652 | p->new_size = rsz; | |
653 | charge = try_again = true; | |
654 | ||
655 | } else if (phase == PHASE_UNDERCHARGE && xsz != UINT64_MAX && xsz < share) { | |
656 | /* This partition accepts less than its calculated | |
657 | * share. Let's assign it that, and take this partition out | |
658 | * of all calculations and start again. */ | |
659 | ||
660 | p->new_size = xsz; | |
661 | charge = try_again = true; | |
662 | ||
663 | } else if (phase == PHASE_DISTRIBUTE) { | |
664 | /* This partition can accept its calculated share. Let's | |
665 | * assign it. There's no need to restart things here since | |
666 | * assigning this shouldn't impact the shares of the other | |
667 | * partitions. */ | |
668 | ||
669 | if (PARTITION_IS_FOREIGN(p)) | |
670 | /* Never change of foreign partitions (i.e. those we don't manage) */ | |
671 | p->new_size = p->current_size; | |
672 | else | |
673 | p->new_size = MAX(round_down_size(share, 4096), rsz); | |
674 | ||
675 | charge = true; | |
676 | } | |
677 | ||
678 | if (charge) { | |
679 | *span = charge_size(*span, p->new_size); | |
680 | *weight_sum = charge_weight(*weight_sum, p->weight); | |
681 | } | |
682 | ||
683 | if (try_again) | |
684 | return 0; /* try again */ | |
685 | } | |
686 | ||
687 | if (p->new_padding == UINT64_MAX) { | |
688 | bool charge = false, try_again = false; | |
689 | uint64_t share; | |
690 | ||
691 | r = scale_by_weight(*span, p->padding_weight, *weight_sum, &share); | |
692 | if (r < 0) | |
693 | return r; | |
694 | ||
695 | if (phase == PHASE_OVERCHARGE && p->padding_min != UINT64_MAX && p->padding_min > share) { | |
696 | p->new_padding = p->padding_min; | |
697 | charge = try_again = true; | |
698 | } else if (phase == PHASE_UNDERCHARGE && p->padding_max != UINT64_MAX && p->padding_max < share) { | |
699 | p->new_padding = p->padding_max; | |
700 | charge = try_again = true; | |
701 | } else if (phase == PHASE_DISTRIBUTE) { | |
702 | ||
703 | p->new_padding = round_down_size(share, 4096); | |
704 | if (p->padding_min != UINT64_MAX && p->new_padding < p->padding_min) | |
705 | p->new_padding = p->padding_min; | |
706 | ||
707 | charge = true; | |
708 | } | |
709 | ||
710 | if (charge) { | |
711 | *span = charge_size(*span, p->new_padding); | |
712 | *weight_sum = charge_weight(*weight_sum, p->padding_weight); | |
713 | } | |
714 | ||
715 | if (try_again) | |
716 | return 0; /* try again */ | |
717 | } | |
718 | } | |
719 | ||
720 | return 1; /* done */ | |
721 | } | |
722 | ||
723 | static int context_grow_partitions_on_free_area(Context *context, FreeArea *a) { | |
724 | uint64_t weight_sum = 0, span; | |
725 | int r; | |
726 | ||
727 | assert(context); | |
728 | assert(a); | |
729 | ||
730 | r = context_sum_weights(context, a, &weight_sum); | |
731 | if (r < 0) | |
732 | return r; | |
733 | ||
734 | /* Let's calculate the total area covered by this free area and the partition before it */ | |
735 | span = a->size; | |
736 | if (a->after) { | |
737 | assert(a->after->offset != UINT64_MAX); | |
738 | assert(a->after->current_size != UINT64_MAX); | |
739 | ||
740 | span += round_up_size(a->after->offset + a->after->current_size, 4096) - a->after->offset; | |
741 | } | |
742 | ||
743 | GrowPartitionPhase phase = PHASE_OVERCHARGE; | |
744 | for (;;) { | |
745 | r = context_grow_partitions_phase(context, a, phase, &span, &weight_sum); | |
746 | if (r < 0) | |
747 | return r; | |
748 | if (r == 0) /* not done yet, re-run this phase */ | |
749 | continue; | |
750 | ||
751 | if (phase == PHASE_OVERCHARGE) | |
752 | phase = PHASE_UNDERCHARGE; | |
753 | else if (phase == PHASE_UNDERCHARGE) | |
754 | phase = PHASE_DISTRIBUTE; | |
755 | else if (phase == PHASE_DISTRIBUTE) | |
756 | break; | |
757 | } | |
758 | ||
162392b7 | 759 | /* We still have space left over? Donate to preceding partition if we have one */ |
e594a3b1 LP |
760 | if (span > 0 && a->after && !PARTITION_IS_FOREIGN(a->after)) { |
761 | uint64_t m, xsz; | |
762 | ||
763 | assert(a->after->new_size != UINT64_MAX); | |
764 | m = a->after->new_size + span; | |
765 | ||
766 | xsz = partition_max_size(a->after); | |
767 | if (xsz != UINT64_MAX && m > xsz) | |
768 | m = xsz; | |
769 | ||
770 | span = charge_size(span, m - a->after->new_size); | |
771 | a->after->new_size = m; | |
772 | } | |
773 | ||
162392b7 | 774 | /* What? Even still some space left (maybe because there was no preceding partition, or it had a |
e594a3b1 LP |
775 | * size limit), then let's donate it to whoever wants it. */ |
776 | if (span > 0) { | |
777 | Partition *p; | |
778 | ||
779 | LIST_FOREACH(partitions, p, context->partitions) { | |
780 | uint64_t m, xsz; | |
781 | ||
782 | if (p->allocated_to_area != a) | |
783 | continue; | |
784 | ||
785 | if (PARTITION_IS_FOREIGN(p)) | |
786 | continue; | |
787 | ||
788 | assert(p->new_size != UINT64_MAX); | |
789 | m = p->new_size + span; | |
790 | ||
db144226 | 791 | xsz = partition_max_size(p); |
e594a3b1 LP |
792 | if (xsz != UINT64_MAX && m > xsz) |
793 | m = xsz; | |
794 | ||
795 | span = charge_size(span, m - p->new_size); | |
796 | p->new_size = m; | |
797 | ||
798 | if (span == 0) | |
799 | break; | |
800 | } | |
801 | } | |
802 | ||
162392b7 | 803 | /* Yuck, still no one? Then make it padding */ |
e594a3b1 LP |
804 | if (span > 0 && a->after) { |
805 | assert(a->after->new_padding != UINT64_MAX); | |
806 | a->after->new_padding += span; | |
807 | } | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static int context_grow_partitions(Context *context) { | |
813 | Partition *p; | |
814 | int r; | |
815 | ||
816 | assert(context); | |
817 | ||
818 | for (size_t i = 0; i < context->n_free_areas; i++) { | |
819 | r = context_grow_partitions_on_free_area(context, context->free_areas[i]); | |
820 | if (r < 0) | |
821 | return r; | |
822 | } | |
823 | ||
824 | /* All existing partitions that have no free space after them can't change size */ | |
825 | LIST_FOREACH(partitions, p, context->partitions) { | |
826 | if (p->dropped) | |
827 | continue; | |
828 | ||
829 | if (!PARTITION_EXISTS(p) || p->padding_area) { | |
830 | /* The algorithm above must have initialized this already */ | |
831 | assert(p->new_size != UINT64_MAX); | |
832 | continue; | |
833 | } | |
834 | ||
835 | assert(p->new_size == UINT64_MAX); | |
836 | p->new_size = p->current_size; | |
837 | ||
838 | assert(p->new_padding == UINT64_MAX); | |
839 | p->new_padding = p->current_padding; | |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | static void context_place_partitions(Context *context) { | |
846 | uint64_t partno = 0; | |
847 | Partition *p; | |
848 | ||
849 | assert(context); | |
850 | ||
851 | /* Determine next partition number to assign */ | |
852 | LIST_FOREACH(partitions, p, context->partitions) { | |
853 | if (!PARTITION_EXISTS(p)) | |
854 | continue; | |
855 | ||
856 | assert(p->partno != UINT64_MAX); | |
857 | if (p->partno >= partno) | |
858 | partno = p->partno + 1; | |
859 | } | |
860 | ||
861 | for (size_t i = 0; i < context->n_free_areas; i++) { | |
862 | FreeArea *a = context->free_areas[i]; | |
863 | uint64_t start, left; | |
864 | ||
865 | if (a->after) { | |
866 | assert(a->after->offset != UINT64_MAX); | |
867 | assert(a->after->new_size != UINT64_MAX); | |
868 | assert(a->after->new_padding != UINT64_MAX); | |
869 | ||
870 | start = a->after->offset + a->after->new_size + a->after->new_padding; | |
871 | } else | |
872 | start = context->start; | |
873 | ||
874 | start = round_up_size(start, 4096); | |
875 | left = a->size; | |
876 | ||
877 | LIST_FOREACH(partitions, p, context->partitions) { | |
878 | if (p->allocated_to_area != a) | |
879 | continue; | |
880 | ||
881 | p->offset = start; | |
882 | p->partno = partno++; | |
883 | ||
884 | assert(left >= p->new_size); | |
885 | start += p->new_size; | |
886 | left -= p->new_size; | |
887 | ||
888 | assert(left >= p->new_padding); | |
889 | start += p->new_padding; | |
890 | left -= p->new_padding; | |
891 | } | |
892 | } | |
893 | } | |
894 | ||
e594a3b1 LP |
895 | static int config_parse_type( |
896 | const char *unit, | |
897 | const char *filename, | |
898 | unsigned line, | |
899 | const char *section, | |
900 | unsigned section_line, | |
901 | const char *lvalue, | |
902 | int ltype, | |
903 | const char *rvalue, | |
904 | void *data, | |
905 | void *userdata) { | |
906 | ||
907 | sd_id128_t *type_uuid = data; | |
908 | int r; | |
909 | ||
910 | assert(rvalue); | |
911 | assert(type_uuid); | |
912 | ||
913 | r = gpt_partition_type_uuid_from_string(rvalue, type_uuid); | |
914 | if (r < 0) | |
915 | return log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse partition type: %s", rvalue); | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
8a794850 | 920 | static const Specifier specifier_table[] = { |
2824aa07 | 921 | COMMON_SYSTEM_SPECIFIERS, |
8a794850 LP |
922 | {} |
923 | }; | |
924 | ||
e594a3b1 LP |
925 | static int config_parse_label( |
926 | const char *unit, | |
927 | const char *filename, | |
928 | unsigned line, | |
929 | const char *section, | |
930 | unsigned section_line, | |
931 | const char *lvalue, | |
932 | int ltype, | |
933 | const char *rvalue, | |
934 | void *data, | |
935 | void *userdata) { | |
936 | ||
937 | _cleanup_free_ char16_t *recoded = NULL; | |
e031166e | 938 | _cleanup_free_ char *resolved = NULL; |
e594a3b1 LP |
939 | char **label = data; |
940 | int r; | |
941 | ||
942 | assert(rvalue); | |
943 | assert(label); | |
944 | ||
e031166e LP |
945 | r = specifier_printf(rvalue, specifier_table, NULL, &resolved); |
946 | if (r < 0) { | |
e459258f | 947 | log_syntax(unit, LOG_WARNING, filename, line, r, |
e031166e LP |
948 | "Failed to expand specifiers in Label=, ignoring: %s", rvalue); |
949 | return 0; | |
950 | } | |
951 | ||
952 | if (!utf8_is_valid(resolved)) { | |
e594a3b1 LP |
953 | log_syntax(unit, LOG_WARNING, filename, line, 0, |
954 | "Partition label not valid UTF-8, ignoring: %s", rvalue); | |
955 | return 0; | |
956 | } | |
957 | ||
e031166e | 958 | recoded = utf8_to_utf16(resolved, strlen(resolved)); |
e594a3b1 LP |
959 | if (!recoded) |
960 | return log_oom(); | |
961 | ||
962 | if (char16_strlen(recoded) > 36) { | |
963 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
46072ae3 ZJS |
964 | "Partition label too long for GPT table, ignoring: \"%s\" (from \"%s\")", |
965 | resolved, rvalue); | |
e594a3b1 LP |
966 | return 0; |
967 | } | |
968 | ||
e031166e | 969 | free_and_replace(*label, resolved); |
e594a3b1 LP |
970 | return 0; |
971 | } | |
972 | ||
973 | static int config_parse_weight( | |
974 | const char *unit, | |
975 | const char *filename, | |
976 | unsigned line, | |
977 | const char *section, | |
978 | unsigned section_line, | |
979 | const char *lvalue, | |
980 | int ltype, | |
981 | const char *rvalue, | |
982 | void *data, | |
983 | void *userdata) { | |
984 | ||
985 | uint32_t *priority = data, v; | |
986 | int r; | |
987 | ||
988 | assert(rvalue); | |
989 | assert(priority); | |
990 | ||
991 | r = safe_atou32(rvalue, &v); | |
992 | if (r < 0) { | |
993 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
994 | "Failed to parse weight value, ignoring: %s", rvalue); | |
995 | return 0; | |
996 | } | |
997 | ||
998 | if (v > 1000U*1000U) { | |
c8f3d767 | 999 | log_syntax(unit, LOG_WARNING, filename, line, 0, |
e594a3b1 LP |
1000 | "Weight needs to be in range 0…10000000, ignoring: %" PRIu32, v); |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | *priority = v; | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int config_parse_size4096( | |
1009 | const char *unit, | |
1010 | const char *filename, | |
1011 | unsigned line, | |
1012 | const char *section, | |
1013 | unsigned section_line, | |
1014 | const char *lvalue, | |
1015 | int ltype, | |
1016 | const char *rvalue, | |
1017 | void *data, | |
1018 | void *userdata) { | |
1019 | ||
1020 | uint64_t *sz = data, parsed; | |
1021 | int r; | |
1022 | ||
1023 | assert(rvalue); | |
1024 | assert(data); | |
1025 | ||
1026 | r = parse_size(rvalue, 1024, &parsed); | |
1027 | if (r < 0) | |
c8f3d767 | 1028 | return log_syntax(unit, LOG_ERR, filename, line, r, |
e594a3b1 LP |
1029 | "Failed to parse size value: %s", rvalue); |
1030 | ||
1031 | if (ltype > 0) | |
1032 | *sz = round_up_size(parsed, 4096); | |
1033 | else if (ltype < 0) | |
1034 | *sz = round_down_size(parsed, 4096); | |
1035 | else | |
1036 | *sz = parsed; | |
1037 | ||
1038 | if (*sz != parsed) | |
1039 | log_syntax(unit, LOG_NOTICE, filename, line, r, "Rounded %s= size %" PRIu64 " → %" PRIu64 ", a multiple of 4096.", lvalue, parsed, *sz); | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
53171c04 LP |
1044 | static int config_parse_fstype( |
1045 | const char *unit, | |
1046 | const char *filename, | |
1047 | unsigned line, | |
1048 | const char *section, | |
1049 | unsigned section_line, | |
1050 | const char *lvalue, | |
1051 | int ltype, | |
1052 | const char *rvalue, | |
1053 | void *data, | |
1054 | void *userdata) { | |
1055 | ||
1056 | char **fstype = data; | |
1057 | ||
1058 | assert(rvalue); | |
1059 | assert(data); | |
1060 | ||
1061 | if (!filename_is_valid(rvalue)) | |
1062 | return log_syntax(unit, LOG_ERR, filename, line, 0, | |
1063 | "File system type is not valid, refusing: %s", rvalue); | |
1064 | ||
1065 | return free_and_strdup_warn(fstype, rvalue); | |
1066 | } | |
1067 | ||
8a794850 LP |
1068 | static int config_parse_copy_files( |
1069 | const char *unit, | |
1070 | const char *filename, | |
1071 | unsigned line, | |
1072 | const char *section, | |
1073 | unsigned section_line, | |
1074 | const char *lvalue, | |
1075 | int ltype, | |
1076 | const char *rvalue, | |
1077 | void *data, | |
1078 | void *userdata) { | |
1079 | ||
1080 | _cleanup_free_ char *source = NULL, *buffer = NULL, *resolved_source = NULL, *resolved_target = NULL; | |
1081 | const char *p = rvalue, *target; | |
1082 | Partition *partition = data; | |
1083 | int r; | |
1084 | ||
1085 | assert(rvalue); | |
1086 | assert(partition); | |
1087 | ||
1088 | r = extract_first_word(&p, &source, ":", EXTRACT_CUNESCAPE|EXTRACT_DONT_COALESCE_SEPARATORS); | |
1089 | if (r < 0) | |
1090 | return log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract source path: %s", rvalue); | |
1091 | if (r == 0) { | |
1092 | log_syntax(unit, LOG_WARNING, filename, line, 0, "No argument specified: %s", rvalue); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | r = extract_first_word(&p, &buffer, ":", EXTRACT_CUNESCAPE|EXTRACT_DONT_COALESCE_SEPARATORS); | |
1097 | if (r < 0) | |
1098 | return log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract target path: %s", rvalue); | |
1099 | if (r == 0) | |
1100 | target = source; /* No target, then it's the same as the source */ | |
1101 | else | |
1102 | target = buffer; | |
1103 | ||
1104 | if (!isempty(p)) | |
1105 | return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL), "Too many arguments: %s", rvalue); | |
1106 | ||
1107 | r = specifier_printf(source, specifier_table, NULL, &resolved_source); | |
1108 | if (r < 0) { | |
1109 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
1110 | "Failed to expand specifiers in CopyFiles= source, ignoring: %s", rvalue); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | if (!path_is_absolute(resolved_source) || !path_is_normalized(resolved_source)) { | |
1115 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
1116 | "Invalid path name in CopyFiles= source, ignoring: %s", resolved_source); | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | r = specifier_printf(target, specifier_table, NULL, &resolved_target); | |
1121 | if (r < 0) { | |
1122 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
1123 | "Failed to expand specifiers in CopyFiles= target, ignoring: %s", resolved_target); | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | if (!path_is_absolute(resolved_target) || !path_is_normalized(resolved_target)) { | |
1128 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
1129 | "Invalid path name in CopyFiles= source, ignoring: %s", resolved_target); | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | r = strv_consume_pair(&partition->copy_files, TAKE_PTR(resolved_source), TAKE_PTR(resolved_target)); | |
1134 | if (r < 0) | |
1135 | return log_oom(); | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
e594a3b1 LP |
1140 | static int partition_read_definition(Partition *p, const char *path) { |
1141 | ||
1142 | ConfigTableItem table[] = { | |
8a794850 LP |
1143 | { "Partition", "Type", config_parse_type, 0, &p->type_uuid }, |
1144 | { "Partition", "Label", config_parse_label, 0, &p->new_label }, | |
1145 | { "Partition", "UUID", config_parse_id128, 0, &p->new_uuid }, | |
1146 | { "Partition", "Priority", config_parse_int32, 0, &p->priority }, | |
1147 | { "Partition", "Weight", config_parse_weight, 0, &p->weight }, | |
1148 | { "Partition", "PaddingWeight", config_parse_weight, 0, &p->padding_weight }, | |
1149 | { "Partition", "SizeMinBytes", config_parse_size4096, 1, &p->size_min }, | |
1150 | { "Partition", "SizeMaxBytes", config_parse_size4096, -1, &p->size_max }, | |
1151 | { "Partition", "PaddingMinBytes", config_parse_size4096, 1, &p->padding_min }, | |
1152 | { "Partition", "PaddingMaxBytes", config_parse_size4096, -1, &p->padding_max }, | |
1153 | { "Partition", "FactoryReset", config_parse_bool, 0, &p->factory_reset }, | |
1154 | { "Partition", "CopyBlocks", config_parse_path, 0, &p->copy_blocks_path }, | |
1155 | { "Partition", "Format", config_parse_fstype, 0, &p->format }, | |
1156 | { "Partition", "CopyFiles", config_parse_copy_files, 0, p }, | |
b9df3536 | 1157 | { "Partition", "Encrypt", config_parse_bool, 0, &p->encrypt }, |
e594a3b1 LP |
1158 | {} |
1159 | }; | |
1160 | int r; | |
1161 | ||
4f9ff96a LP |
1162 | r = config_parse(NULL, path, NULL, |
1163 | "Partition\0", | |
1164 | config_item_table_lookup, table, | |
1165 | CONFIG_PARSE_WARN, | |
1166 | p, | |
1167 | NULL); | |
e594a3b1 LP |
1168 | if (r < 0) |
1169 | return r; | |
1170 | ||
1171 | if (p->size_min != UINT64_MAX && p->size_max != UINT64_MAX && p->size_min > p->size_max) | |
1172 | return log_syntax(NULL, LOG_ERR, path, 1, SYNTHETIC_ERRNO(EINVAL), | |
1173 | "SizeMinBytes= larger than SizeMaxBytes=, refusing."); | |
1174 | ||
1175 | if (p->padding_min != UINT64_MAX && p->padding_max != UINT64_MAX && p->padding_min > p->padding_max) | |
1176 | return log_syntax(NULL, LOG_ERR, path, 1, SYNTHETIC_ERRNO(EINVAL), | |
1177 | "PaddingMinBytes= larger than PaddingMaxBytes=, refusing."); | |
1178 | ||
1179 | if (sd_id128_is_null(p->type_uuid)) | |
1180 | return log_syntax(NULL, LOG_ERR, path, 1, SYNTHETIC_ERRNO(EINVAL), | |
1181 | "Type= not defined, refusing."); | |
1182 | ||
8a794850 | 1183 | if (p->copy_blocks_path && (p->format || !strv_isempty(p->copy_files))) |
53171c04 LP |
1184 | return log_syntax(NULL, LOG_ERR, path, 1, SYNTHETIC_ERRNO(EINVAL), |
1185 | "Format= and CopyBlocks= cannot be combined, refusing."); | |
1186 | ||
8a794850 LP |
1187 | if (!strv_isempty(p->copy_files) && streq_ptr(p->format, "swap")) |
1188 | return log_syntax(NULL, LOG_ERR, path, 1, SYNTHETIC_ERRNO(EINVAL), | |
1189 | "Format=swap and CopyFiles= cannot be combined, refusing."); | |
1190 | ||
b9df3536 LP |
1191 | if (!p->format && (!strv_isempty(p->copy_files) || (p->encrypt && !p->copy_blocks_path))) { |
1192 | /* Pick "ext4" as file system if we are configured to copy files or encrypt the device */ | |
8a794850 LP |
1193 | p->format = strdup("ext4"); |
1194 | if (!p->format) | |
1195 | return log_oom(); | |
1196 | } | |
1197 | ||
e594a3b1 LP |
1198 | return 0; |
1199 | } | |
1200 | ||
1201 | static int context_read_definitions( | |
1202 | Context *context, | |
1203 | const char *directory, | |
1204 | const char *root) { | |
1205 | ||
1206 | _cleanup_strv_free_ char **files = NULL; | |
1207 | Partition *last = NULL; | |
1208 | char **f; | |
1209 | int r; | |
1210 | ||
1211 | assert(context); | |
1212 | ||
1213 | if (directory) | |
1214 | r = conf_files_list_strv(&files, ".conf", NULL, CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, (const char**) STRV_MAKE(directory)); | |
1215 | else | |
1216 | r = conf_files_list_strv(&files, ".conf", root, CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, (const char**) CONF_PATHS_STRV("repart.d")); | |
1217 | if (r < 0) | |
1218 | return log_error_errno(r, "Failed to enumerate *.conf files: %m"); | |
1219 | ||
1220 | STRV_FOREACH(f, files) { | |
1221 | _cleanup_(partition_freep) Partition *p = NULL; | |
1222 | ||
1223 | p = partition_new(); | |
1224 | if (!p) | |
1225 | return log_oom(); | |
1226 | ||
1227 | p->definition_path = strdup(*f); | |
1228 | if (!p->definition_path) | |
1229 | return log_oom(); | |
1230 | ||
1231 | r = partition_read_definition(p, *f); | |
1232 | if (r < 0) | |
1233 | return r; | |
1234 | ||
1235 | LIST_INSERT_AFTER(partitions, context->partitions, last, p); | |
1236 | last = TAKE_PTR(p); | |
1237 | context->n_partitions++; | |
1238 | } | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct fdisk_context*, fdisk_unref_context); | |
1244 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct fdisk_partition*, fdisk_unref_partition); | |
1245 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct fdisk_parttype*, fdisk_unref_parttype); | |
1246 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct fdisk_table*, fdisk_unref_table); | |
1247 | ||
1248 | static int determine_current_padding( | |
1249 | struct fdisk_context *c, | |
1250 | struct fdisk_table *t, | |
1251 | struct fdisk_partition *p, | |
1252 | uint64_t *ret) { | |
1253 | ||
1254 | size_t n_partitions; | |
1255 | uint64_t offset, next = UINT64_MAX; | |
1256 | ||
1257 | assert(c); | |
1258 | assert(t); | |
1259 | assert(p); | |
1260 | ||
1261 | if (!fdisk_partition_has_end(p)) | |
1262 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Partition has no end!"); | |
1263 | ||
1264 | offset = fdisk_partition_get_end(p); | |
1265 | assert(offset < UINT64_MAX / 512); | |
1266 | offset *= 512; | |
1267 | ||
1268 | n_partitions = fdisk_table_get_nents(t); | |
1269 | for (size_t i = 0; i < n_partitions; i++) { | |
1270 | struct fdisk_partition *q; | |
1271 | uint64_t start; | |
1272 | ||
1273 | q = fdisk_table_get_partition(t, i); | |
1274 | if (!q) | |
1275 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to read partition metadata: %m"); | |
1276 | ||
1277 | if (fdisk_partition_is_used(q) <= 0) | |
1278 | continue; | |
1279 | ||
1280 | if (!fdisk_partition_has_start(q)) | |
1281 | continue; | |
1282 | ||
1283 | start = fdisk_partition_get_start(q); | |
1284 | assert(start < UINT64_MAX / 512); | |
1285 | start *= 512; | |
1286 | ||
1287 | if (start >= offset && (next == UINT64_MAX || next > start)) | |
1288 | next = start; | |
1289 | } | |
1290 | ||
1291 | if (next == UINT64_MAX) { | |
1292 | /* No later partition? In that case check the end of the usable area */ | |
1293 | next = fdisk_get_last_lba(c); | |
1294 | assert(next < UINT64_MAX); | |
1295 | next++; /* The last LBA is one sector before the end */ | |
1296 | ||
1297 | assert(next < UINT64_MAX / 512); | |
1298 | next *= 512; | |
1299 | ||
1300 | if (offset > next) | |
1301 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Partition end beyond disk end."); | |
1302 | } | |
1303 | ||
1304 | assert(next >= offset); | |
1305 | offset = round_up_size(offset, 4096); | |
1306 | next = round_down_size(next, 4096); | |
1307 | ||
1308 | if (next >= offset) /* Check again, rounding might have fucked things up */ | |
1309 | *ret = next - offset; | |
1310 | else | |
1311 | *ret = 0; | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static int fdisk_ask_cb(struct fdisk_context *c, struct fdisk_ask *ask, void *data) { | |
1317 | _cleanup_free_ char *ids = NULL; | |
1318 | int r; | |
1319 | ||
1320 | if (fdisk_ask_get_type(ask) != FDISK_ASKTYPE_STRING) | |
1321 | return -EINVAL; | |
1322 | ||
1323 | ids = new(char, ID128_UUID_STRING_MAX); | |
1324 | if (!ids) | |
1325 | return -ENOMEM; | |
1326 | ||
1327 | r = fdisk_ask_string_set_result(ask, id128_to_uuid_string(*(sd_id128_t*) data, ids)); | |
1328 | if (r < 0) | |
1329 | return r; | |
1330 | ||
1331 | TAKE_PTR(ids); | |
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | static int fdisk_set_disklabel_id_by_uuid(struct fdisk_context *c, sd_id128_t id) { | |
1336 | int r; | |
1337 | ||
1338 | r = fdisk_set_ask(c, fdisk_ask_cb, &id); | |
1339 | if (r < 0) | |
1340 | return r; | |
1341 | ||
1342 | r = fdisk_set_disklabel_id(c); | |
1343 | if (r < 0) | |
1344 | return r; | |
1345 | ||
1346 | return fdisk_set_ask(c, NULL, NULL); | |
1347 | } | |
1348 | ||
53171c04 | 1349 | static int derive_uuid(sd_id128_t base, const char *token, sd_id128_t *ret) { |
e594a3b1 LP |
1350 | union { |
1351 | unsigned char md[SHA256_DIGEST_LENGTH]; | |
1352 | sd_id128_t id; | |
1353 | } result; | |
1354 | ||
53171c04 | 1355 | assert(token); |
e594a3b1 LP |
1356 | assert(ret); |
1357 | ||
53171c04 LP |
1358 | /* Derive a new UUID from the specified UUID in a stable and reasonably safe way. Specifically, we |
1359 | * calculate the HMAC-SHA256 of the specified token string, keyed by the supplied base (typically the | |
1360 | * machine ID). We use the machine ID as key (and not as cleartext!) of the HMAC operation since it's | |
1361 | * the machine ID we don't want to leak. */ | |
e594a3b1 LP |
1362 | |
1363 | if (!HMAC(EVP_sha256(), | |
53171c04 LP |
1364 | &base, sizeof(base), |
1365 | (const unsigned char*) token, strlen(token), | |
e594a3b1 LP |
1366 | result.md, NULL)) |
1367 | return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE), "HMAC-SHA256 calculation failed."); | |
1368 | ||
1369 | /* Take the first half, mark it as v4 UUID */ | |
1370 | assert_cc(sizeof(result.md) == sizeof(result.id) * 2); | |
1371 | *ret = id128_make_v4_uuid(result.id); | |
1372 | return 0; | |
1373 | } | |
1374 | ||
a26f4a49 LP |
1375 | static int context_load_partition_table( |
1376 | Context *context, | |
1377 | const char *node, | |
1378 | int *backing_fd) { | |
1379 | ||
e594a3b1 LP |
1380 | _cleanup_(fdisk_unref_contextp) struct fdisk_context *c = NULL; |
1381 | _cleanup_(fdisk_unref_tablep) struct fdisk_table *t = NULL; | |
1382 | uint64_t left_boundary = UINT64_MAX, first_lba, last_lba, nsectors; | |
1383 | _cleanup_free_ char *disk_uuid_string = NULL; | |
1384 | bool from_scratch = false; | |
1385 | sd_id128_t disk_uuid; | |
1386 | size_t n_partitions; | |
1387 | int r; | |
1388 | ||
1389 | assert(context); | |
1390 | assert(node); | |
a26f4a49 | 1391 | assert(backing_fd); |
170c9823 LP |
1392 | assert(!context->fdisk_context); |
1393 | assert(!context->free_areas); | |
1394 | assert(context->start == UINT64_MAX); | |
1395 | assert(context->end == UINT64_MAX); | |
1396 | assert(context->total == UINT64_MAX); | |
e594a3b1 LP |
1397 | |
1398 | c = fdisk_new_context(); | |
1399 | if (!c) | |
1400 | return log_oom(); | |
1401 | ||
a26f4a49 LP |
1402 | /* libfdisk doesn't have an API to operate on arbitrary fds, hence reopen the fd going via the |
1403 | * /proc/self/fd/ magic path if we have an existing fd. Open the original file otherwise. */ | |
1404 | if (*backing_fd < 0) | |
1405 | r = fdisk_assign_device(c, node, arg_dry_run); | |
1406 | else { | |
1407 | char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)]; | |
1408 | xsprintf(procfs_path, "/proc/self/fd/%i", *backing_fd); | |
1409 | ||
1410 | r = fdisk_assign_device(c, procfs_path, arg_dry_run); | |
1411 | } | |
170c9823 LP |
1412 | if (r == -EINVAL && arg_size_auto) { |
1413 | struct stat st; | |
1414 | ||
1415 | /* libfdisk returns EINVAL if opening a file of size zero. Let's check for that, and accept | |
1416 | * it if automatic sizing is requested. */ | |
1417 | ||
1418 | if (*backing_fd < 0) | |
1419 | r = stat(node, &st); | |
1420 | else | |
1421 | r = fstat(*backing_fd, &st); | |
1422 | if (r < 0) | |
1423 | return log_error_errno(errno, "Failed to stat block device '%s': %m", node); | |
1424 | ||
1425 | if (S_ISREG(st.st_mode) && st.st_size == 0) | |
1426 | return /* from_scratch = */ true; | |
1427 | ||
1428 | r = -EINVAL; | |
1429 | } | |
e594a3b1 | 1430 | if (r < 0) |
a26f4a49 LP |
1431 | return log_error_errno(r, "Failed to open device '%s': %m", node); |
1432 | ||
1433 | if (*backing_fd < 0) { | |
1434 | /* If we have no fd referencing the device yet, make a copy of the fd now, so that we have one */ | |
1435 | *backing_fd = fcntl(fdisk_get_devfd(c), F_DUPFD_CLOEXEC, 3); | |
1436 | if (*backing_fd < 0) | |
1437 | return log_error_errno(errno, "Failed to duplicate fdisk fd: %m"); | |
1438 | } | |
e594a3b1 LP |
1439 | |
1440 | /* Tell udev not to interfere while we are processing the device */ | |
1441 | if (flock(fdisk_get_devfd(c), arg_dry_run ? LOCK_SH : LOCK_EX) < 0) | |
1442 | return log_error_errno(errno, "Failed to lock block device: %m"); | |
1443 | ||
1444 | switch (arg_empty) { | |
1445 | ||
1446 | case EMPTY_REFUSE: | |
1447 | /* Refuse empty disks, insist on an existing GPT partition table */ | |
1448 | if (!fdisk_is_labeltype(c, FDISK_DISKLABEL_GPT)) | |
1449 | return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON), "Disk %s has no GPT disk label, not repartitioning.", node); | |
1450 | ||
1451 | break; | |
1452 | ||
1453 | case EMPTY_REQUIRE: | |
1454 | /* Require an empty disk, refuse any existing partition table */ | |
1455 | r = fdisk_has_label(c); | |
1456 | if (r < 0) | |
1457 | return log_error_errno(r, "Failed to determine whether disk %s has a disk label: %m", node); | |
1458 | if (r > 0) | |
1459 | return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON), "Disk %s already has a disk label, refusing.", node); | |
1460 | ||
1461 | from_scratch = true; | |
1462 | break; | |
1463 | ||
1464 | case EMPTY_ALLOW: | |
1465 | /* Allow both an empty disk and an existing partition table, but only GPT */ | |
1466 | r = fdisk_has_label(c); | |
1467 | if (r < 0) | |
1468 | return log_error_errno(r, "Failed to determine whether disk %s has a disk label: %m", node); | |
1469 | if (r > 0) { | |
1470 | if (!fdisk_is_labeltype(c, FDISK_DISKLABEL_GPT)) | |
1471 | return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON), "Disk %s has non-GPT disk label, not repartitioning.", node); | |
1472 | } else | |
1473 | from_scratch = true; | |
1474 | ||
1475 | break; | |
1476 | ||
1477 | case EMPTY_FORCE: | |
a26f4a49 | 1478 | case EMPTY_CREATE: |
e594a3b1 LP |
1479 | /* Always reinitiaize the disk, don't consider what there was on the disk before */ |
1480 | from_scratch = true; | |
1481 | break; | |
1482 | } | |
1483 | ||
1484 | if (from_scratch) { | |
e594a3b1 LP |
1485 | r = fdisk_create_disklabel(c, "gpt"); |
1486 | if (r < 0) | |
1487 | return log_error_errno(r, "Failed to create GPT disk label: %m"); | |
1488 | ||
53171c04 | 1489 | r = derive_uuid(context->seed, "disk-uuid", &disk_uuid); |
e594a3b1 LP |
1490 | if (r < 0) |
1491 | return log_error_errno(r, "Failed to acquire disk GPT uuid: %m"); | |
1492 | ||
1493 | r = fdisk_set_disklabel_id_by_uuid(c, disk_uuid); | |
1494 | if (r < 0) | |
1495 | return log_error_errno(r, "Failed to set GPT disk label: %m"); | |
1496 | ||
1497 | goto add_initial_free_area; | |
1498 | } | |
1499 | ||
1500 | r = fdisk_get_disklabel_id(c, &disk_uuid_string); | |
1501 | if (r < 0) | |
1502 | return log_error_errno(r, "Failed to get current GPT disk label UUID: %m"); | |
1503 | ||
1504 | r = sd_id128_from_string(disk_uuid_string, &disk_uuid); | |
1505 | if (r < 0) | |
1506 | return log_error_errno(r, "Failed to parse current GPT disk label UUID: %m"); | |
1507 | ||
1508 | if (sd_id128_is_null(disk_uuid)) { | |
53171c04 | 1509 | r = derive_uuid(context->seed, "disk-uuid", &disk_uuid); |
e594a3b1 LP |
1510 | if (r < 0) |
1511 | return log_error_errno(r, "Failed to acquire disk GPT uuid: %m"); | |
1512 | ||
1513 | r = fdisk_set_disklabel_id(c); | |
1514 | if (r < 0) | |
1515 | return log_error_errno(r, "Failed to set GPT disk label: %m"); | |
1516 | } | |
1517 | ||
1518 | r = fdisk_get_partitions(c, &t); | |
1519 | if (r < 0) | |
1520 | return log_error_errno(r, "Failed to acquire partition table: %m"); | |
1521 | ||
1522 | n_partitions = fdisk_table_get_nents(t); | |
1523 | for (size_t i = 0; i < n_partitions; i++) { | |
1524 | _cleanup_free_ char *label_copy = NULL; | |
1525 | Partition *pp, *last = NULL; | |
1526 | struct fdisk_partition *p; | |
1527 | struct fdisk_parttype *pt; | |
1528 | const char *pts, *ids, *label; | |
1529 | uint64_t sz, start; | |
1530 | bool found = false; | |
1531 | sd_id128_t ptid, id; | |
1532 | size_t partno; | |
1533 | ||
1534 | p = fdisk_table_get_partition(t, i); | |
1535 | if (!p) | |
1536 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to read partition metadata: %m"); | |
1537 | ||
1538 | if (fdisk_partition_is_used(p) <= 0) | |
1539 | continue; | |
1540 | ||
1541 | if (fdisk_partition_has_start(p) <= 0 || | |
1542 | fdisk_partition_has_size(p) <= 0 || | |
1543 | fdisk_partition_has_partno(p) <= 0) | |
1544 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Found a partition without a position, size or number."); | |
1545 | ||
1546 | pt = fdisk_partition_get_type(p); | |
1547 | if (!pt) | |
1548 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to acquire type of partition: %m"); | |
1549 | ||
1550 | pts = fdisk_parttype_get_string(pt); | |
1551 | if (!pts) | |
1552 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to acquire type of partition as string: %m"); | |
1553 | ||
1554 | r = sd_id128_from_string(pts, &ptid); | |
1555 | if (r < 0) | |
1556 | return log_error_errno(r, "Failed to parse partition type UUID %s: %m", pts); | |
1557 | ||
1558 | ids = fdisk_partition_get_uuid(p); | |
1559 | if (!ids) | |
1560 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Found a partition without a UUID."); | |
1561 | ||
1562 | r = sd_id128_from_string(ids, &id); | |
1563 | if (r < 0) | |
1564 | return log_error_errno(r, "Failed to parse partition UUID %s: %m", ids); | |
1565 | ||
1566 | label = fdisk_partition_get_name(p); | |
1567 | if (!isempty(label)) { | |
1568 | label_copy = strdup(label); | |
1569 | if (!label_copy) | |
1570 | return log_oom(); | |
1571 | } | |
1572 | ||
1573 | sz = fdisk_partition_get_size(p); | |
1574 | assert_se(sz <= UINT64_MAX/512); | |
1575 | sz *= 512; | |
1576 | ||
1577 | start = fdisk_partition_get_start(p); | |
1578 | assert_se(start <= UINT64_MAX/512); | |
1579 | start *= 512; | |
1580 | ||
1581 | partno = fdisk_partition_get_partno(p); | |
1582 | ||
1583 | if (left_boundary == UINT64_MAX || left_boundary > start) | |
1584 | left_boundary = start; | |
1585 | ||
1586 | /* Assign this existing partition to the first partition of the right type that doesn't have | |
1587 | * an existing one assigned yet. */ | |
1588 | LIST_FOREACH(partitions, pp, context->partitions) { | |
1589 | last = pp; | |
1590 | ||
1591 | if (!sd_id128_equal(pp->type_uuid, ptid)) | |
1592 | continue; | |
1593 | ||
1594 | if (!pp->current_partition) { | |
1595 | pp->current_uuid = id; | |
1596 | pp->current_size = sz; | |
1597 | pp->offset = start; | |
1598 | pp->partno = partno; | |
1599 | pp->current_label = TAKE_PTR(label_copy); | |
1600 | ||
1601 | pp->current_partition = p; | |
1602 | fdisk_ref_partition(p); | |
1603 | ||
1604 | r = determine_current_padding(c, t, p, &pp->current_padding); | |
1605 | if (r < 0) | |
1606 | return r; | |
1607 | ||
1608 | if (pp->current_padding > 0) { | |
1609 | r = context_add_free_area(context, pp->current_padding, pp); | |
1610 | if (r < 0) | |
1611 | return r; | |
1612 | } | |
1613 | ||
1614 | found = true; | |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | /* If we have no matching definition, create a new one. */ | |
1620 | if (!found) { | |
1621 | _cleanup_(partition_freep) Partition *np = NULL; | |
1622 | ||
1623 | np = partition_new(); | |
1624 | if (!np) | |
1625 | return log_oom(); | |
1626 | ||
1627 | np->current_uuid = id; | |
1628 | np->type_uuid = ptid; | |
1629 | np->current_size = sz; | |
1630 | np->offset = start; | |
1631 | np->partno = partno; | |
1632 | np->current_label = TAKE_PTR(label_copy); | |
1633 | ||
1634 | np->current_partition = p; | |
1635 | fdisk_ref_partition(p); | |
1636 | ||
1637 | r = determine_current_padding(c, t, p, &np->current_padding); | |
1638 | if (r < 0) | |
1639 | return r; | |
1640 | ||
1641 | if (np->current_padding > 0) { | |
1642 | r = context_add_free_area(context, np->current_padding, np); | |
1643 | if (r < 0) | |
1644 | return r; | |
1645 | } | |
1646 | ||
1647 | LIST_INSERT_AFTER(partitions, context->partitions, last, TAKE_PTR(np)); | |
1648 | context->n_partitions++; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | add_initial_free_area: | |
1653 | nsectors = fdisk_get_nsectors(c); | |
1654 | assert(nsectors <= UINT64_MAX/512); | |
1655 | nsectors *= 512; | |
1656 | ||
1657 | first_lba = fdisk_get_first_lba(c); | |
1658 | assert(first_lba <= UINT64_MAX/512); | |
1659 | first_lba *= 512; | |
1660 | ||
1661 | last_lba = fdisk_get_last_lba(c); | |
1662 | assert(last_lba < UINT64_MAX); | |
1663 | last_lba++; | |
1664 | assert(last_lba <= UINT64_MAX/512); | |
1665 | last_lba *= 512; | |
1666 | ||
1667 | assert(last_lba >= first_lba); | |
1668 | ||
1669 | if (left_boundary == UINT64_MAX) { | |
1670 | /* No partitions at all? Then the whole disk is up for grabs. */ | |
1671 | ||
1672 | first_lba = round_up_size(first_lba, 4096); | |
1673 | last_lba = round_down_size(last_lba, 4096); | |
1674 | ||
1675 | if (last_lba > first_lba) { | |
1676 | r = context_add_free_area(context, last_lba - first_lba, NULL); | |
1677 | if (r < 0) | |
1678 | return r; | |
1679 | } | |
1680 | } else { | |
1681 | /* Add space left of first partition */ | |
1682 | assert(left_boundary >= first_lba); | |
1683 | ||
1684 | first_lba = round_up_size(first_lba, 4096); | |
1685 | left_boundary = round_down_size(left_boundary, 4096); | |
1686 | last_lba = round_down_size(last_lba, 4096); | |
1687 | ||
1688 | if (left_boundary > first_lba) { | |
1689 | r = context_add_free_area(context, left_boundary - first_lba, NULL); | |
1690 | if (r < 0) | |
1691 | return r; | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | context->start = first_lba; | |
1696 | context->end = last_lba; | |
1697 | context->total = nsectors; | |
1698 | context->fdisk_context = TAKE_PTR(c); | |
1699 | ||
1700 | return from_scratch; | |
1701 | } | |
1702 | ||
1703 | static void context_unload_partition_table(Context *context) { | |
1704 | Partition *p, *next; | |
1705 | ||
1706 | assert(context); | |
1707 | ||
1708 | LIST_FOREACH_SAFE(partitions, p, next, context->partitions) { | |
1709 | ||
1710 | /* Entirely remove partitions that have no configuration */ | |
1711 | if (PARTITION_IS_FOREIGN(p)) { | |
1712 | partition_unlink_and_free(context, p); | |
1713 | continue; | |
1714 | } | |
1715 | ||
1716 | /* Otherwise drop all data we read off the block device and everything we might have | |
1717 | * calculated based on it */ | |
1718 | ||
1719 | p->dropped = false; | |
1720 | p->current_size = UINT64_MAX; | |
1721 | p->new_size = UINT64_MAX; | |
1722 | p->current_padding = UINT64_MAX; | |
1723 | p->new_padding = UINT64_MAX; | |
1724 | p->partno = UINT64_MAX; | |
1725 | p->offset = UINT64_MAX; | |
1726 | ||
1727 | if (p->current_partition) { | |
1728 | fdisk_unref_partition(p->current_partition); | |
1729 | p->current_partition = NULL; | |
1730 | } | |
1731 | ||
1732 | if (p->new_partition) { | |
1733 | fdisk_unref_partition(p->new_partition); | |
1734 | p->new_partition = NULL; | |
1735 | } | |
1736 | ||
1737 | p->padding_area = NULL; | |
1738 | p->allocated_to_area = NULL; | |
1739 | ||
15d43e30 LP |
1740 | p->current_uuid = SD_ID128_NULL; |
1741 | p->current_label = mfree(p->current_label); | |
e594a3b1 LP |
1742 | } |
1743 | ||
1744 | context->start = UINT64_MAX; | |
1745 | context->end = UINT64_MAX; | |
1746 | context->total = UINT64_MAX; | |
1747 | ||
1748 | if (context->fdisk_context) { | |
1749 | fdisk_unref_context(context->fdisk_context); | |
1750 | context->fdisk_context = NULL; | |
1751 | } | |
1752 | ||
1753 | context_free_free_areas(context); | |
1754 | } | |
1755 | ||
1756 | static int format_size_change(uint64_t from, uint64_t to, char **ret) { | |
1757 | char format_buffer1[FORMAT_BYTES_MAX], format_buffer2[FORMAT_BYTES_MAX], *buf; | |
1758 | ||
1759 | if (from != UINT64_MAX) | |
1760 | format_bytes(format_buffer1, sizeof(format_buffer1), from); | |
1761 | if (to != UINT64_MAX) | |
1762 | format_bytes(format_buffer2, sizeof(format_buffer2), to); | |
1763 | ||
1764 | if (from != UINT64_MAX) { | |
1765 | if (from == to || to == UINT64_MAX) | |
1766 | buf = strdup(format_buffer1); | |
1767 | else | |
1768 | buf = strjoin(format_buffer1, " ", special_glyph(SPECIAL_GLYPH_ARROW), " ", format_buffer2); | |
1769 | } else if (to != UINT64_MAX) | |
1770 | buf = strjoin(special_glyph(SPECIAL_GLYPH_ARROW), " ", format_buffer2); | |
1771 | else { | |
1772 | *ret = NULL; | |
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | if (!buf) | |
1777 | return log_oom(); | |
1778 | ||
1779 | *ret = TAKE_PTR(buf); | |
1780 | return 1; | |
1781 | } | |
1782 | ||
1783 | static const char *partition_label(const Partition *p) { | |
1784 | assert(p); | |
1785 | ||
1786 | if (p->new_label) | |
1787 | return p->new_label; | |
1788 | ||
1789 | if (p->current_label) | |
1790 | return p->current_label; | |
1791 | ||
1792 | return gpt_partition_type_uuid_to_string(p->type_uuid); | |
1793 | } | |
1794 | ||
1795 | static int context_dump_partitions(Context *context, const char *node) { | |
1796 | _cleanup_(table_unrefp) Table *t = NULL; | |
1797 | uint64_t sum_padding = 0, sum_size = 0; | |
1798 | Partition *p; | |
1799 | int r; | |
1800 | ||
a015fbe7 TH |
1801 | if (!arg_json && context->n_partitions == 0) { |
1802 | log_info("Empty partition table."); | |
1803 | return 0; | |
1804 | } | |
1805 | ||
1806 | t = table_new("type", "label", "uuid", "file", "node", "offset", "old size", "raw size", "size", "old padding", "raw padding", "padding", "activity"); | |
e594a3b1 LP |
1807 | if (!t) |
1808 | return log_oom(); | |
1809 | ||
a015fbe7 TH |
1810 | if (!DEBUG_LOGGING) { |
1811 | if (arg_json) | |
1812 | (void) table_set_display(t, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4, | |
1813 | (size_t) 5, (size_t) 6, (size_t) 7, (size_t) 9, (size_t) 10, (size_t) 12, (size_t) -1); | |
1814 | else | |
1815 | (void) table_set_display(t, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4, | |
1816 | (size_t) 8, (size_t) 11, (size_t) -1); | |
1817 | } | |
e594a3b1 LP |
1818 | |
1819 | (void) table_set_align_percent(t, table_get_cell(t, 0, 4), 100); | |
1820 | (void) table_set_align_percent(t, table_get_cell(t, 0, 5), 100); | |
1821 | ||
1822 | LIST_FOREACH(partitions, p, context->partitions) { | |
1823 | _cleanup_free_ char *size_change = NULL, *padding_change = NULL, *partname = NULL; | |
1824 | char uuid_buffer[ID128_UUID_STRING_MAX]; | |
a015fbe7 | 1825 | const char *label, *activity = NULL; |
e594a3b1 LP |
1826 | |
1827 | if (p->dropped) | |
1828 | continue; | |
1829 | ||
a015fbe7 TH |
1830 | if (p->current_size == UINT64_MAX) |
1831 | activity = "create"; | |
1832 | else if (p->current_size != p->new_size) | |
1833 | activity = "resize"; | |
1834 | ||
e594a3b1 LP |
1835 | label = partition_label(p); |
1836 | partname = p->partno != UINT64_MAX ? fdisk_partname(node, p->partno+1) : NULL; | |
1837 | ||
1838 | r = format_size_change(p->current_size, p->new_size, &size_change); | |
1839 | if (r < 0) | |
1840 | return r; | |
1841 | ||
1842 | r = format_size_change(p->current_padding, p->new_padding, &padding_change); | |
1843 | if (r < 0) | |
1844 | return r; | |
1845 | ||
1846 | if (p->new_size != UINT64_MAX) | |
1847 | sum_size += p->new_size; | |
1848 | if (p->new_padding != UINT64_MAX) | |
1849 | sum_padding += p->new_padding; | |
1850 | ||
1851 | r = table_add_many( | |
1852 | t, | |
1853 | TABLE_STRING, gpt_partition_type_uuid_to_string_harder(p->type_uuid, uuid_buffer), | |
1854 | TABLE_STRING, label ?: "-", TABLE_SET_COLOR, label ? NULL : ansi_grey(), | |
1855 | TABLE_UUID, sd_id128_is_null(p->new_uuid) ? p->current_uuid : p->new_uuid, | |
1856 | TABLE_STRING, p->definition_path ? basename(p->definition_path) : "-", TABLE_SET_COLOR, p->definition_path ? NULL : ansi_grey(), | |
a015fbe7 | 1857 | TABLE_STRING, partname ?: "-", TABLE_SET_COLOR, partname ? NULL : ansi_highlight(), |
e594a3b1 | 1858 | TABLE_UINT64, p->offset, |
a015fbe7 | 1859 | TABLE_UINT64, p->current_size == UINT64_MAX ? 0 : p->current_size, |
e594a3b1 LP |
1860 | TABLE_UINT64, p->new_size, |
1861 | TABLE_STRING, size_change, TABLE_SET_COLOR, !p->partitions_next && sum_size > 0 ? ansi_underline() : NULL, | |
a015fbe7 | 1862 | TABLE_UINT64, p->current_padding == UINT64_MAX ? 0 : p->current_padding, |
e594a3b1 | 1863 | TABLE_UINT64, p->new_padding, |
a015fbe7 TH |
1864 | TABLE_STRING, padding_change, TABLE_SET_COLOR, !p->partitions_next && sum_padding > 0 ? ansi_underline() : NULL, |
1865 | TABLE_STRING, activity ?: "unknown"); | |
e594a3b1 | 1866 | if (r < 0) |
f987a261 | 1867 | return table_log_add_error(r); |
e594a3b1 LP |
1868 | } |
1869 | ||
a015fbe7 | 1870 | if (!arg_json && (sum_padding > 0 || sum_size > 0)) { |
e594a3b1 LP |
1871 | char s[FORMAT_BYTES_MAX]; |
1872 | const char *a, *b; | |
1873 | ||
1874 | a = strjoina(special_glyph(SPECIAL_GLYPH_SIGMA), " = ", format_bytes(s, sizeof(s), sum_size)); | |
1875 | b = strjoina(special_glyph(SPECIAL_GLYPH_SIGMA), " = ", format_bytes(s, sizeof(s), sum_padding)); | |
1876 | ||
1877 | r = table_add_many( | |
1878 | t, | |
1879 | TABLE_EMPTY, | |
1880 | TABLE_EMPTY, | |
1881 | TABLE_EMPTY, | |
1882 | TABLE_EMPTY, | |
1883 | TABLE_EMPTY, | |
1884 | TABLE_EMPTY, | |
1885 | TABLE_EMPTY, | |
a015fbe7 | 1886 | TABLE_EMPTY, |
e594a3b1 LP |
1887 | TABLE_STRING, a, |
1888 | TABLE_EMPTY, | |
a015fbe7 TH |
1889 | TABLE_EMPTY, |
1890 | TABLE_STRING, b, | |
1891 | TABLE_EMPTY); | |
e594a3b1 | 1892 | if (r < 0) |
f987a261 | 1893 | return table_log_add_error(r); |
e594a3b1 LP |
1894 | } |
1895 | ||
a015fbe7 TH |
1896 | if (arg_json) |
1897 | r = table_print_json(t, stdout, arg_json_format_flags); | |
1898 | else | |
1899 | r = table_print(t, stdout); | |
e594a3b1 LP |
1900 | if (r < 0) |
1901 | return log_error_errno(r, "Failed to dump table: %m"); | |
1902 | ||
1903 | return 0; | |
1904 | } | |
1905 | ||
1906 | static void context_bar_char_process_partition( | |
1907 | Context *context, | |
1908 | Partition *bar[], | |
1909 | size_t n, | |
1910 | Partition *p, | |
1911 | size_t *ret_start) { | |
1912 | ||
1913 | uint64_t from, to, total; | |
1914 | size_t x, y; | |
1915 | ||
1916 | assert(context); | |
1917 | assert(bar); | |
1918 | assert(n > 0); | |
1919 | assert(p); | |
1920 | ||
1921 | if (p->dropped) | |
1922 | return; | |
1923 | ||
1924 | assert(p->offset != UINT64_MAX); | |
1925 | assert(p->new_size != UINT64_MAX); | |
1926 | ||
1927 | from = p->offset; | |
1928 | to = from + p->new_size; | |
1929 | ||
1930 | assert(context->end >= context->start); | |
1931 | total = context->end - context->start; | |
1932 | ||
1933 | assert(from >= context->start); | |
1934 | assert(from <= context->end); | |
1935 | x = (from - context->start) * n / total; | |
1936 | ||
1937 | assert(to >= context->start); | |
1938 | assert(to <= context->end); | |
1939 | y = (to - context->start) * n / total; | |
1940 | ||
1941 | assert(x <= y); | |
1942 | assert(y <= n); | |
1943 | ||
1944 | for (size_t i = x; i < y; i++) | |
1945 | bar[i] = p; | |
1946 | ||
1947 | *ret_start = x; | |
1948 | } | |
1949 | ||
1950 | static int partition_hint(const Partition *p, const char *node, char **ret) { | |
1951 | _cleanup_free_ char *buf = NULL; | |
1952 | char ids[ID128_UUID_STRING_MAX]; | |
1953 | const char *label; | |
1954 | sd_id128_t id; | |
1955 | ||
1956 | /* Tries really hard to find a suitable description for this partition */ | |
1957 | ||
1958 | if (p->definition_path) { | |
1959 | buf = strdup(basename(p->definition_path)); | |
1960 | goto done; | |
1961 | } | |
1962 | ||
1963 | label = partition_label(p); | |
1964 | if (!isempty(label)) { | |
1965 | buf = strdup(label); | |
1966 | goto done; | |
1967 | } | |
1968 | ||
1969 | if (p->partno != UINT64_MAX) { | |
1970 | buf = fdisk_partname(node, p->partno+1); | |
1971 | goto done; | |
1972 | } | |
1973 | ||
1974 | if (!sd_id128_is_null(p->new_uuid)) | |
1975 | id = p->new_uuid; | |
1976 | else if (!sd_id128_is_null(p->current_uuid)) | |
1977 | id = p->current_uuid; | |
1978 | else | |
1979 | id = p->type_uuid; | |
1980 | ||
1981 | buf = strdup(id128_to_uuid_string(id, ids)); | |
1982 | ||
1983 | done: | |
1984 | if (!buf) | |
1985 | return -ENOMEM; | |
1986 | ||
1987 | *ret = TAKE_PTR(buf); | |
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | static int context_dump_partition_bar(Context *context, const char *node) { | |
1992 | _cleanup_free_ Partition **bar = NULL; | |
1993 | _cleanup_free_ size_t *start_array = NULL; | |
1994 | Partition *p, *last = NULL; | |
1995 | bool z = false; | |
1996 | size_t c, j = 0; | |
1997 | ||
f391597c | 1998 | assert_se((c = columns()) >= 2); |
e594a3b1 LP |
1999 | c -= 2; /* We do not use the leftmost and rightmost character cell */ |
2000 | ||
2001 | bar = new0(Partition*, c); | |
2002 | if (!bar) | |
2003 | return log_oom(); | |
2004 | ||
2005 | start_array = new(size_t, context->n_partitions); | |
2006 | if (!start_array) | |
2007 | return log_oom(); | |
2008 | ||
2009 | LIST_FOREACH(partitions, p, context->partitions) | |
2010 | context_bar_char_process_partition(context, bar, c, p, start_array + j++); | |
2011 | ||
2012 | putc(' ', stdout); | |
2013 | ||
2014 | for (size_t i = 0; i < c; i++) { | |
2015 | if (bar[i]) { | |
2016 | if (last != bar[i]) | |
2017 | z = !z; | |
2018 | ||
2019 | fputs(z ? ansi_green() : ansi_yellow(), stdout); | |
2020 | fputs(special_glyph(SPECIAL_GLYPH_DARK_SHADE), stdout); | |
2021 | } else { | |
2022 | fputs(ansi_normal(), stdout); | |
2023 | fputs(special_glyph(SPECIAL_GLYPH_LIGHT_SHADE), stdout); | |
2024 | } | |
2025 | ||
2026 | last = bar[i]; | |
2027 | } | |
2028 | ||
2029 | fputs(ansi_normal(), stdout); | |
2030 | putc('\n', stdout); | |
2031 | ||
2032 | for (size_t i = 0; i < context->n_partitions; i++) { | |
2033 | _cleanup_free_ char **line = NULL; | |
2034 | ||
2035 | line = new0(char*, c); | |
2036 | if (!line) | |
2037 | return log_oom(); | |
2038 | ||
2039 | j = 0; | |
2040 | LIST_FOREACH(partitions, p, context->partitions) { | |
2041 | _cleanup_free_ char *d = NULL; | |
2042 | j++; | |
2043 | ||
2044 | if (i < context->n_partitions - j) { | |
2045 | ||
2046 | if (line[start_array[j-1]]) { | |
2047 | const char *e; | |
2048 | ||
2049 | /* Upgrade final corner to the right with a branch to the right */ | |
2050 | e = startswith(line[start_array[j-1]], special_glyph(SPECIAL_GLYPH_TREE_RIGHT)); | |
2051 | if (e) { | |
2052 | d = strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH), e); | |
2053 | if (!d) | |
2054 | return log_oom(); | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | if (!d) { | |
2059 | d = strdup(special_glyph(SPECIAL_GLYPH_TREE_VERTICAL)); | |
2060 | if (!d) | |
2061 | return log_oom(); | |
2062 | } | |
2063 | ||
2064 | } else if (i == context->n_partitions - j) { | |
2065 | _cleanup_free_ char *hint = NULL; | |
2066 | ||
2067 | (void) partition_hint(p, node, &hint); | |
2068 | ||
2069 | if (streq_ptr(line[start_array[j-1]], special_glyph(SPECIAL_GLYPH_TREE_VERTICAL))) | |
2070 | d = strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH), " ", strna(hint)); | |
2071 | else | |
2072 | d = strjoin(special_glyph(SPECIAL_GLYPH_TREE_RIGHT), " ", strna(hint)); | |
2073 | ||
2074 | if (!d) | |
2075 | return log_oom(); | |
2076 | } | |
2077 | ||
2078 | if (d) | |
2079 | free_and_replace(line[start_array[j-1]], d); | |
2080 | } | |
2081 | ||
2082 | putc(' ', stdout); | |
2083 | ||
2084 | j = 0; | |
2085 | while (j < c) { | |
2086 | if (line[j]) { | |
2087 | fputs(line[j], stdout); | |
2088 | j += utf8_console_width(line[j]); | |
2089 | } else { | |
2090 | putc(' ', stdout); | |
2091 | j++; | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | putc('\n', stdout); | |
2096 | ||
2097 | for (j = 0; j < c; j++) | |
2098 | free(line[j]); | |
2099 | } | |
2100 | ||
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | static bool context_changed(const Context *context) { | |
2105 | Partition *p; | |
2106 | ||
2107 | LIST_FOREACH(partitions, p, context->partitions) { | |
2108 | if (p->dropped) | |
2109 | continue; | |
2110 | ||
2111 | if (p->allocated_to_area) | |
2112 | return true; | |
2113 | ||
2114 | if (p->new_size != p->current_size) | |
2115 | return true; | |
2116 | } | |
2117 | ||
2118 | return false; | |
2119 | } | |
2120 | ||
81873a6b | 2121 | static int context_wipe_range(Context *context, uint64_t offset, uint64_t size) { |
e594a3b1 LP |
2122 | _cleanup_(blkid_free_probep) blkid_probe probe = NULL; |
2123 | int r; | |
2124 | ||
2125 | assert(context); | |
81873a6b LP |
2126 | assert(offset != UINT64_MAX); |
2127 | assert(size != UINT64_MAX); | |
e594a3b1 LP |
2128 | |
2129 | probe = blkid_new_probe(); | |
2130 | if (!probe) | |
2131 | return log_oom(); | |
2132 | ||
e594a3b1 | 2133 | errno = 0; |
81873a6b | 2134 | r = blkid_probe_set_device(probe, fdisk_get_devfd(context->fdisk_context), offset, size); |
e594a3b1 | 2135 | if (r < 0) |
81873a6b | 2136 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to allocate device probe for wiping."); |
e594a3b1 LP |
2137 | |
2138 | errno = 0; | |
2139 | if (blkid_probe_enable_superblocks(probe, true) < 0 || | |
2140 | blkid_probe_set_superblocks_flags(probe, BLKID_SUBLKS_MAGIC|BLKID_SUBLKS_BADCSUM) < 0 || | |
2141 | blkid_probe_enable_partitions(probe, true) < 0 || | |
2142 | blkid_probe_set_partitions_flags(probe, BLKID_PARTS_MAGIC) < 0) | |
81873a6b | 2143 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to enable superblock and partition probing."); |
e594a3b1 LP |
2144 | |
2145 | for (;;) { | |
2146 | errno = 0; | |
2147 | r = blkid_do_probe(probe); | |
2148 | if (r < 0) | |
2149 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe for file systems."); | |
2150 | if (r > 0) | |
2151 | break; | |
2152 | ||
2153 | errno = 0; | |
2154 | if (blkid_do_wipe(probe, false) < 0) | |
2155 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to wipe file system signature."); | |
2156 | } | |
2157 | ||
e594a3b1 LP |
2158 | return 0; |
2159 | } | |
2160 | ||
81873a6b LP |
2161 | static int context_wipe_partition(Context *context, Partition *p) { |
2162 | int r; | |
2163 | ||
2164 | assert(context); | |
2165 | assert(p); | |
2166 | assert(!PARTITION_EXISTS(p)); /* Safety check: never wipe existing partitions */ | |
2167 | ||
2168 | assert(p->offset != UINT64_MAX); | |
2169 | assert(p->new_size != UINT64_MAX); | |
2170 | ||
2171 | r = context_wipe_range(context, p->offset, p->new_size); | |
2172 | if (r < 0) | |
2173 | return r; | |
2174 | ||
2175 | log_info("Successfully wiped file system signatures from future partition %" PRIu64 ".", p->partno); | |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | static int context_discard_range( | |
2180 | Context *context, | |
2181 | uint64_t offset, | |
2182 | uint64_t size) { | |
2183 | ||
e594a3b1 LP |
2184 | struct stat st; |
2185 | int fd; | |
2186 | ||
2187 | assert(context); | |
2188 | assert(offset != UINT64_MAX); | |
2189 | assert(size != UINT64_MAX); | |
2190 | ||
2191 | if (size <= 0) | |
2192 | return 0; | |
2193 | ||
a26f4a49 | 2194 | assert_se((fd = fdisk_get_devfd(context->fdisk_context)) >= 0); |
e594a3b1 LP |
2195 | |
2196 | if (fstat(fd, &st) < 0) | |
2197 | return -errno; | |
2198 | ||
2199 | if (S_ISREG(st.st_mode)) { | |
2200 | if (fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, offset, size) < 0) { | |
2201 | if (ERRNO_IS_NOT_SUPPORTED(errno)) | |
2202 | return -EOPNOTSUPP; | |
2203 | ||
2204 | return -errno; | |
2205 | } | |
2206 | ||
2207 | return 1; | |
2208 | } | |
2209 | ||
2210 | if (S_ISBLK(st.st_mode)) { | |
2211 | uint64_t range[2], end; | |
2212 | ||
2213 | range[0] = round_up_size(offset, 512); | |
2214 | ||
2215 | end = offset + size; | |
2216 | if (end <= range[0]) | |
2217 | return 0; | |
2218 | ||
2219 | range[1] = round_down_size(end - range[0], 512); | |
2220 | if (range[1] <= 0) | |
2221 | return 0; | |
2222 | ||
2223 | if (ioctl(fd, BLKDISCARD, range) < 0) { | |
2224 | if (ERRNO_IS_NOT_SUPPORTED(errno)) | |
2225 | return -EOPNOTSUPP; | |
2226 | ||
2227 | return -errno; | |
2228 | } | |
2229 | ||
2230 | return 1; | |
2231 | } | |
2232 | ||
2233 | return -EOPNOTSUPP; | |
2234 | } | |
2235 | ||
2236 | static int context_discard_partition(Context *context, Partition *p) { | |
2237 | int r; | |
2238 | ||
2239 | assert(context); | |
2240 | assert(p); | |
2241 | ||
2242 | assert(p->offset != UINT64_MAX); | |
2243 | assert(p->new_size != UINT64_MAX); | |
2244 | assert(!PARTITION_EXISTS(p)); /* Safety check: never discard existing partitions */ | |
2245 | ||
2246 | if (!arg_discard) | |
2247 | return 0; | |
2248 | ||
2249 | r = context_discard_range(context, p->offset, p->new_size); | |
2250 | if (r == -EOPNOTSUPP) { | |
5b5109e2 | 2251 | log_info("Storage does not support discard, not discarding data in future partition %" PRIu64 ".", p->partno); |
e594a3b1 LP |
2252 | return 0; |
2253 | } | |
2254 | if (r == 0) { | |
2255 | log_info("Partition %" PRIu64 " too short for discard, skipping.", p->partno); | |
2256 | return 0; | |
2257 | } | |
2258 | if (r < 0) | |
5b5109e2 | 2259 | return log_error_errno(r, "Failed to discard data for future partition %" PRIu64 ".", p->partno); |
e594a3b1 | 2260 | |
5b5109e2 | 2261 | log_info("Successfully discarded data from future partition %" PRIu64 ".", p->partno); |
e594a3b1 LP |
2262 | return 1; |
2263 | } | |
2264 | ||
2265 | static int context_discard_gap_after(Context *context, Partition *p) { | |
2266 | uint64_t gap, next = UINT64_MAX; | |
2267 | Partition *q; | |
2268 | int r; | |
2269 | ||
2270 | assert(context); | |
2271 | assert(!p || (p->offset != UINT64_MAX && p->new_size != UINT64_MAX)); | |
2272 | ||
2273 | if (p) | |
2274 | gap = p->offset + p->new_size; | |
2275 | else | |
2276 | gap = context->start; | |
2277 | ||
2278 | LIST_FOREACH(partitions, q, context->partitions) { | |
2279 | if (q->dropped) | |
2280 | continue; | |
2281 | ||
2282 | assert(q->offset != UINT64_MAX); | |
2283 | assert(q->new_size != UINT64_MAX); | |
2284 | ||
2285 | if (q->offset < gap) | |
2286 | continue; | |
2287 | ||
2288 | if (next == UINT64_MAX || q->offset < next) | |
2289 | next = q->offset; | |
2290 | } | |
2291 | ||
2292 | if (next == UINT64_MAX) { | |
2293 | next = context->end; | |
2294 | if (gap > next) | |
2295 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Partition end beyond disk end."); | |
2296 | } | |
2297 | ||
2298 | assert(next >= gap); | |
2299 | r = context_discard_range(context, gap, next - gap); | |
2300 | if (r == -EOPNOTSUPP) { | |
2301 | if (p) | |
5b5109e2 | 2302 | log_info("Storage does not support discard, not discarding gap after partition %" PRIu64 ".", p->partno); |
e594a3b1 | 2303 | else |
5b5109e2 | 2304 | log_info("Storage does not support discard, not discarding gap at beginning of disk."); |
e594a3b1 LP |
2305 | return 0; |
2306 | } | |
2307 | if (r == 0) /* Too short */ | |
2308 | return 0; | |
2309 | if (r < 0) { | |
2310 | if (p) | |
2311 | return log_error_errno(r, "Failed to discard gap after partition %" PRIu64 ".", p->partno); | |
2312 | else | |
2313 | return log_error_errno(r, "Failed to discard gap at beginning of disk."); | |
2314 | } | |
2315 | ||
2316 | if (p) | |
2317 | log_info("Successfully discarded gap after partition %" PRIu64 ".", p->partno); | |
2318 | else | |
2319 | log_info("Successfully discarded gap at beginning of disk."); | |
2320 | ||
2321 | return 0; | |
2322 | } | |
2323 | ||
2324 | static int context_wipe_and_discard(Context *context, bool from_scratch) { | |
2325 | Partition *p; | |
2326 | int r; | |
2327 | ||
2328 | assert(context); | |
2329 | ||
2330 | /* Wipe and discard the contents of all partitions we are about to create. We skip the discarding if | |
2331 | * we were supposed to start from scratch anyway, as in that case we just discard the whole block | |
2332 | * device in one go early on. */ | |
2333 | ||
2334 | LIST_FOREACH(partitions, p, context->partitions) { | |
2335 | ||
2336 | if (!p->allocated_to_area) | |
2337 | continue; | |
2338 | ||
e594a3b1 LP |
2339 | r = context_wipe_partition(context, p); |
2340 | if (r < 0) | |
2341 | return r; | |
2342 | ||
2343 | if (!from_scratch) { | |
f0cb1b95 LP |
2344 | r = context_discard_partition(context, p); |
2345 | if (r < 0) | |
2346 | return r; | |
2347 | ||
e594a3b1 LP |
2348 | r = context_discard_gap_after(context, p); |
2349 | if (r < 0) | |
2350 | return r; | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | if (!from_scratch) { | |
2355 | r = context_discard_gap_after(context, NULL); | |
2356 | if (r < 0) | |
2357 | return r; | |
2358 | } | |
2359 | ||
2360 | return 0; | |
2361 | } | |
2362 | ||
b9df3536 LP |
2363 | static int partition_encrypt( |
2364 | Partition *p, | |
2365 | const char *node, | |
2366 | struct crypt_device **ret_cd, | |
2367 | char **ret_volume, | |
2368 | int *ret_fd) { | |
3dd8ae5c | 2369 | #if HAVE_LIBCRYPTSETUP |
0d12936d | 2370 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
b9df3536 LP |
2371 | _cleanup_(erase_and_freep) void *volume_key = NULL; |
2372 | _cleanup_free_ char *dm_name = NULL, *vol = NULL; | |
2373 | char suuid[ID128_UUID_STRING_MAX]; | |
2374 | size_t volume_key_size = 256 / 8; | |
2375 | sd_id128_t uuid; | |
2376 | int r; | |
2377 | ||
2378 | assert(p); | |
2379 | assert(p->encrypt); | |
2380 | ||
0d12936d LP |
2381 | r = dlopen_cryptsetup(); |
2382 | if (r < 0) | |
2383 | return log_error_errno(r, "libcryptsetup not found, cannot encrypt: %m"); | |
2384 | ||
b9df3536 LP |
2385 | if (asprintf(&dm_name, "luks-repart-%08" PRIx64, random_u64()) < 0) |
2386 | return log_oom(); | |
2387 | ||
2388 | if (ret_volume) { | |
2389 | vol = path_join("/dev/mapper/", dm_name); | |
2390 | if (!vol) | |
2391 | return log_oom(); | |
2392 | } | |
2393 | ||
2394 | r = derive_uuid(p->new_uuid, "luks-uuid", &uuid); | |
2395 | if (r < 0) | |
2396 | return r; | |
2397 | ||
2398 | log_info("Encrypting future partition %" PRIu64 "...", p->partno); | |
2399 | ||
2400 | volume_key = malloc(volume_key_size); | |
2401 | if (!volume_key) | |
2402 | return log_oom(); | |
2403 | ||
2404 | r = genuine_random_bytes(volume_key, volume_key_size, RANDOM_BLOCK); | |
2405 | if (r < 0) | |
2406 | return log_error_errno(r, "Failed to generate volume key: %m"); | |
2407 | ||
0d12936d | 2408 | r = sym_crypt_init(&cd, node); |
b9df3536 LP |
2409 | if (r < 0) |
2410 | return log_error_errno(r, "Failed to allocate libcryptsetup context: %m"); | |
2411 | ||
2412 | cryptsetup_enable_logging(cd); | |
2413 | ||
0d12936d | 2414 | r = sym_crypt_format(cd, |
b9df3536 LP |
2415 | CRYPT_LUKS2, |
2416 | "aes", | |
2417 | "xts-plain64", | |
2418 | id128_to_uuid_string(uuid, suuid), | |
2419 | volume_key, | |
2420 | volume_key_size, | |
2421 | &(struct crypt_params_luks2) { | |
2422 | .label = p->new_label, | |
2423 | .sector_size = 512U, | |
2424 | }); | |
2425 | if (r < 0) | |
2426 | return log_error_errno(r, "Failed to LUKS2 format future partition: %m"); | |
2427 | ||
0d12936d | 2428 | r = sym_crypt_keyslot_add_by_volume_key( |
b9df3536 LP |
2429 | cd, |
2430 | CRYPT_ANY_SLOT, | |
2431 | volume_key, | |
2432 | volume_key_size, | |
2433 | strempty(arg_key), | |
2434 | arg_key_size); | |
2435 | if (r < 0) | |
2436 | return log_error_errno(r, "Failed to add LUKS2 key: %m"); | |
2437 | ||
0d12936d | 2438 | r = sym_crypt_activate_by_volume_key( |
b9df3536 LP |
2439 | cd, |
2440 | dm_name, | |
2441 | volume_key, | |
2442 | volume_key_size, | |
2443 | arg_discard ? CRYPT_ACTIVATE_ALLOW_DISCARDS : 0); | |
2444 | if (r < 0) | |
2445 | return log_error_errno(r, "Failed to activate LUKS superblock: %m"); | |
2446 | ||
2447 | log_info("Successfully encrypted future partition %" PRIu64 ".", p->partno); | |
2448 | ||
2449 | if (ret_fd) { | |
2450 | _cleanup_close_ int dev_fd = -1; | |
2451 | ||
2452 | dev_fd = open(vol, O_RDWR|O_CLOEXEC|O_NOCTTY); | |
2453 | if (dev_fd < 0) | |
2454 | return log_error_errno(errno, "Failed to open LUKS volume '%s': %m", vol); | |
2455 | ||
2456 | *ret_fd = TAKE_FD(dev_fd); | |
2457 | } | |
2458 | ||
2459 | if (ret_cd) | |
2460 | *ret_cd = TAKE_PTR(cd); | |
2461 | if (ret_volume) | |
2462 | *ret_volume = TAKE_PTR(vol); | |
2463 | ||
2464 | return 0; | |
3dd8ae5c | 2465 | #else |
2466 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "libcryptsetup is not supported, cannot encrypt: %m"); | |
2467 | #endif | |
b9df3536 LP |
2468 | } |
2469 | ||
2470 | static int deactivate_luks(struct crypt_device *cd, const char *node) { | |
3dd8ae5c | 2471 | #if HAVE_LIBCRYPTSETUP |
b9df3536 LP |
2472 | int r; |
2473 | ||
2474 | if (!cd) | |
2475 | return 0; | |
2476 | ||
2477 | assert(node); | |
2478 | ||
2479 | /* udev or so might access out block device in the background while we are done. Let's hence force | |
2480 | * detach the volume. We sync'ed before, hence this should be safe. */ | |
2481 | ||
0d12936d | 2482 | r = sym_crypt_deactivate_by_name(cd, basename(node), CRYPT_DEACTIVATE_FORCE); |
b9df3536 LP |
2483 | if (r < 0) |
2484 | return log_error_errno(r, "Failed to deactivate LUKS device: %m"); | |
2485 | ||
2486 | return 1; | |
3dd8ae5c | 2487 | #else |
2488 | return 0; | |
2489 | #endif | |
b9df3536 LP |
2490 | } |
2491 | ||
757bc2e4 LP |
2492 | static int context_copy_blocks(Context *context) { |
2493 | Partition *p; | |
b9df3536 | 2494 | int whole_fd = -1, r; |
757bc2e4 LP |
2495 | |
2496 | assert(context); | |
2497 | ||
2498 | /* Copy in file systems on the block level */ | |
2499 | ||
2500 | LIST_FOREACH(partitions, p, context->partitions) { | |
0d12936d | 2501 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
b9df3536 LP |
2502 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; |
2503 | _cleanup_free_ char *encrypted = NULL; | |
2504 | _cleanup_close_ int encrypted_dev_fd = -1; | |
757bc2e4 | 2505 | char buf[FORMAT_BYTES_MAX]; |
b9df3536 | 2506 | int target_fd; |
757bc2e4 LP |
2507 | |
2508 | if (p->copy_blocks_fd < 0) | |
2509 | continue; | |
2510 | ||
2511 | if (p->dropped) | |
2512 | continue; | |
2513 | ||
2514 | if (PARTITION_EXISTS(p)) /* Never copy over existing partitions */ | |
2515 | continue; | |
2516 | ||
2517 | assert(p->new_size != UINT64_MAX); | |
2518 | assert(p->copy_blocks_size != UINT64_MAX); | |
2519 | assert(p->new_size >= p->copy_blocks_size); | |
2520 | ||
b9df3536 LP |
2521 | if (whole_fd < 0) |
2522 | assert_se((whole_fd = fdisk_get_devfd(context->fdisk_context)) >= 0); | |
2523 | ||
2524 | if (p->encrypt) { | |
2525 | r = loop_device_make(whole_fd, O_RDWR, p->offset, p->new_size, 0, &d); | |
2526 | if (r < 0) | |
2527 | return log_error_errno(r, "Failed to make loopback device of future partition %" PRIu64 ": %m", p->partno); | |
2528 | ||
2529 | r = loop_device_flock(d, LOCK_EX); | |
2530 | if (r < 0) | |
2531 | return log_error_errno(r, "Failed to lock loopback device: %m"); | |
2532 | ||
2533 | r = partition_encrypt(p, d->node, &cd, &encrypted, &encrypted_dev_fd); | |
2534 | if (r < 0) | |
2535 | return log_error_errno(r, "Failed to encrypt device: %m"); | |
757bc2e4 | 2536 | |
b9df3536 LP |
2537 | if (flock(encrypted_dev_fd, LOCK_EX) < 0) |
2538 | return log_error_errno(errno, "Failed to lock LUKS device: %m"); | |
2539 | ||
2540 | target_fd = encrypted_dev_fd; | |
2541 | } else { | |
2542 | if (lseek(whole_fd, p->offset, SEEK_SET) == (off_t) -1) | |
2543 | return log_error_errno(errno, "Failed to seek to partition offset: %m"); | |
2544 | ||
2545 | target_fd = whole_fd; | |
2546 | } | |
757bc2e4 | 2547 | |
5b5109e2 | 2548 | log_info("Copying in '%s' (%s) on block level into future partition %" PRIu64 ".", p->copy_blocks_path, format_bytes(buf, sizeof(buf), p->copy_blocks_size), p->partno); |
757bc2e4 | 2549 | |
b9df3536 | 2550 | r = copy_bytes_full(p->copy_blocks_fd, target_fd, p->copy_blocks_size, 0, NULL, NULL, NULL, NULL); |
757bc2e4 LP |
2551 | if (r < 0) |
2552 | return log_error_errno(r, "Failed to copy in data from '%s': %m", p->copy_blocks_path); | |
2553 | ||
b9df3536 LP |
2554 | if (fsync(target_fd) < 0) |
2555 | return log_error_errno(r, "Failed to synchronize copied data blocks: %m"); | |
2556 | ||
2557 | if (p->encrypt) { | |
2558 | encrypted_dev_fd = safe_close(encrypted_dev_fd); | |
2559 | ||
2560 | r = deactivate_luks(cd, encrypted); | |
2561 | if (r < 0) | |
2562 | return r; | |
2563 | ||
0d12936d | 2564 | sym_crypt_free(cd); |
b9df3536 LP |
2565 | cd = NULL; |
2566 | ||
2567 | r = loop_device_sync(d); | |
2568 | if (r < 0) | |
2569 | return log_error_errno(r, "Failed to sync loopback device: %m"); | |
2570 | } | |
2571 | ||
757bc2e4 LP |
2572 | log_info("Copying in of '%s' on block level completed.", p->copy_blocks_path); |
2573 | } | |
2574 | ||
2575 | return 0; | |
2576 | } | |
2577 | ||
8a794850 LP |
2578 | static int do_copy_files(Partition *p, const char *fs) { |
2579 | char **source, **target; | |
2580 | int r; | |
2581 | ||
2582 | assert(p); | |
2583 | assert(fs); | |
2584 | ||
2585 | STRV_FOREACH_PAIR(source, target, p->copy_files) { | |
2586 | _cleanup_close_ int sfd = -1, pfd = -1, tfd = -1; | |
2587 | _cleanup_free_ char *dn = NULL; | |
2588 | ||
2589 | dn = dirname_malloc(*target); | |
2590 | if (!dn) | |
2591 | return log_oom(); | |
2592 | ||
2593 | sfd = chase_symlinks_and_open(*source, arg_root, CHASE_PREFIX_ROOT|CHASE_WARN, O_CLOEXEC|O_NOCTTY, NULL); | |
2594 | if (sfd < 0) | |
2595 | return log_error_errno(sfd, "Failed to open source file '%s%s': %m", strempty(arg_root), *source); | |
2596 | ||
2597 | r = fd_verify_regular(sfd); | |
2598 | if (r < 0) { | |
2599 | if (r != -EISDIR) | |
2600 | return log_error_errno(r, "Failed to check type of source file '%s': %m", *source); | |
2601 | ||
2602 | /* We are looking at a directory */ | |
2603 | tfd = chase_symlinks_and_open(*target, fs, CHASE_PREFIX_ROOT|CHASE_WARN, O_RDONLY|O_DIRECTORY|O_CLOEXEC, NULL); | |
2604 | if (tfd < 0) { | |
2605 | if (tfd != -ENOENT) | |
2606 | return log_error_errno(tfd, "Failed to open target directory '%s': %m", *target); | |
2607 | ||
2608 | r = mkdir_p_root(fs, dn, UID_INVALID, GID_INVALID, 0755); | |
2609 | if (r < 0) | |
2610 | return log_error_errno(r, "Failed to create parent directory '%s': %m", dn); | |
2611 | ||
2612 | pfd = chase_symlinks_and_open(dn, fs, CHASE_PREFIX_ROOT|CHASE_WARN, O_RDONLY|O_DIRECTORY|O_CLOEXEC, NULL); | |
2613 | if (pfd < 0) | |
2614 | return log_error_errno(pfd, "Failed to open parent directory of target: %m"); | |
2615 | ||
652d9040 LP |
2616 | r = copy_tree_at( |
2617 | sfd, ".", | |
2618 | pfd, basename(*target), | |
2619 | UID_INVALID, GID_INVALID, | |
2620 | COPY_REFLINK|COPY_MERGE|COPY_REPLACE|COPY_SIGINT|COPY_HARDLINKS); | |
8a794850 | 2621 | } else |
652d9040 LP |
2622 | r = copy_tree_at( |
2623 | sfd, ".", | |
2624 | tfd, ".", | |
2625 | UID_INVALID, GID_INVALID, | |
2626 | COPY_REFLINK|COPY_MERGE|COPY_REPLACE|COPY_SIGINT|COPY_HARDLINKS); | |
8a794850 LP |
2627 | if (r < 0) |
2628 | return log_error_errno(r, "Failed to copy %s%s to %s: %m", strempty(arg_root), *source, *target); | |
2629 | } else { | |
2630 | /* We are looking at a regular file */ | |
2631 | ||
2632 | r = mkdir_p_root(fs, dn, UID_INVALID, GID_INVALID, 0755); | |
2633 | if (r < 0) | |
2634 | return log_error_errno(r, "Failed to create parent directory: %m"); | |
2635 | ||
2636 | pfd = chase_symlinks_and_open(dn, fs, CHASE_PREFIX_ROOT|CHASE_WARN, O_RDONLY|O_DIRECTORY|O_CLOEXEC, NULL); | |
2637 | if (pfd < 0) | |
2638 | return log_error_errno(tfd, "Failed to open parent directory of target: %m"); | |
2639 | ||
2640 | tfd = openat(pfd, basename(*target), O_CREAT|O_EXCL|O_WRONLY|O_CLOEXEC, 0700); | |
2641 | if (tfd < 0) | |
2642 | return log_error_errno(errno, "Failed to create target file '%s': %m", *target); | |
2643 | ||
2644 | r = copy_bytes(sfd, tfd, UINT64_MAX, COPY_REFLINK|COPY_SIGINT); | |
2645 | if (r < 0) | |
2646 | return log_error_errno(r, "Failed to copy '%s%s' to '%s': %m", strempty(arg_root), *source, *target); | |
2647 | ||
2648 | (void) copy_xattr(sfd, tfd); | |
2649 | (void) copy_access(sfd, tfd); | |
2650 | (void) copy_times(sfd, tfd, 0); | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | return 0; | |
2655 | } | |
2656 | ||
2657 | static int partition_copy_files(Partition *p, const char *node) { | |
2658 | int r; | |
2659 | ||
2660 | assert(p); | |
2661 | assert(node); | |
2662 | ||
2663 | if (strv_isempty(p->copy_files)) | |
2664 | return 0; | |
2665 | ||
2666 | log_info("Populating partition %" PRIu64 " with files.", p->partno); | |
2667 | ||
2668 | /* We copy in a child process, since we have to mount the fs for that, and we don't want that fs to | |
2669 | * appear in the host namespace. Hence we fork a child that has its own file system namespace and | |
2670 | * detached mount propagation. */ | |
2671 | ||
2672 | r = safe_fork("(sd-copy)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE, NULL); | |
2673 | if (r < 0) | |
2674 | return r; | |
2675 | if (r == 0) { | |
2676 | static const char fs[] = "/run/systemd/mount-root"; | |
2677 | /* This is a child process with its own mount namespace and propagation to host turned off */ | |
2678 | ||
2679 | r = mkdir_p(fs, 0700); | |
2680 | if (r < 0) { | |
2681 | log_error_errno(r, "Failed to create mount point: %m"); | |
2682 | _exit(EXIT_FAILURE); | |
2683 | } | |
2684 | ||
511a8cfe | 2685 | if (mount_nofollow_verbose(LOG_ERR, node, fs, p->format, MS_NOATIME|MS_NODEV|MS_NOEXEC|MS_NOSUID, NULL) < 0) |
8a794850 LP |
2686 | _exit(EXIT_FAILURE); |
2687 | ||
2688 | if (do_copy_files(p, fs) < 0) | |
2689 | _exit(EXIT_FAILURE); | |
2690 | ||
2691 | r = syncfs_path(AT_FDCWD, fs); | |
2692 | if (r < 0) { | |
2693 | log_error_errno(r, "Failed to synchronize written files: %m"); | |
2694 | _exit(EXIT_FAILURE); | |
2695 | } | |
2696 | ||
2697 | _exit(EXIT_SUCCESS); | |
2698 | } | |
2699 | ||
2700 | log_info("Successfully populated partition %" PRIu64 " with files.", p->partno); | |
2701 | return 0; | |
2702 | } | |
2703 | ||
53171c04 LP |
2704 | static int context_mkfs(Context *context) { |
2705 | Partition *p; | |
2706 | int fd = -1, r; | |
2707 | ||
2708 | assert(context); | |
2709 | ||
2710 | /* Make a file system */ | |
2711 | ||
2712 | LIST_FOREACH(partitions, p, context->partitions) { | |
0d12936d | 2713 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
53171c04 | 2714 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; |
b9df3536 LP |
2715 | _cleanup_free_ char *encrypted = NULL; |
2716 | _cleanup_close_ int encrypted_dev_fd = -1; | |
2717 | const char *fsdev; | |
53171c04 LP |
2718 | sd_id128_t fs_uuid; |
2719 | ||
2720 | if (p->dropped) | |
2721 | continue; | |
2722 | ||
2723 | if (PARTITION_EXISTS(p)) /* Never format existing partitions */ | |
2724 | continue; | |
2725 | ||
2726 | if (!p->format) | |
2727 | continue; | |
2728 | ||
2729 | assert(p->offset != UINT64_MAX); | |
2730 | assert(p->new_size != UINT64_MAX); | |
2731 | ||
2732 | if (fd < 0) | |
2733 | assert_se((fd = fdisk_get_devfd(context->fdisk_context)) >= 0); | |
2734 | ||
2735 | /* Loopback block devices are not only useful to turn regular files into block devices, but | |
2736 | * also to cut out sections of block devices into new block devices. */ | |
2737 | ||
2738 | r = loop_device_make(fd, O_RDWR, p->offset, p->new_size, 0, &d); | |
2739 | if (r < 0) | |
5b5109e2 | 2740 | return log_error_errno(r, "Failed to make loopback device of future partition %" PRIu64 ": %m", p->partno); |
53171c04 LP |
2741 | |
2742 | r = loop_device_flock(d, LOCK_EX); | |
2743 | if (r < 0) | |
2744 | return log_error_errno(r, "Failed to lock loopback device: %m"); | |
2745 | ||
b9df3536 LP |
2746 | if (p->encrypt) { |
2747 | r = partition_encrypt(p, d->node, &cd, &encrypted, &encrypted_dev_fd); | |
2748 | if (r < 0) | |
2749 | return log_error_errno(r, "Failed to encrypt device: %m"); | |
2750 | ||
2751 | if (flock(encrypted_dev_fd, LOCK_EX) < 0) | |
2752 | return log_error_errno(errno, "Failed to lock LUKS device: %m"); | |
2753 | ||
2754 | fsdev = encrypted; | |
2755 | } else | |
2756 | fsdev = d->node; | |
2757 | ||
53171c04 LP |
2758 | log_info("Formatting future partition %" PRIu64 ".", p->partno); |
2759 | ||
2760 | /* Calculate the UUID for the file system as HMAC-SHA256 of the string "file-system-uuid", | |
2761 | * keyed off the partition UUID. */ | |
2762 | r = derive_uuid(p->new_uuid, "file-system-uuid", &fs_uuid); | |
2763 | if (r < 0) | |
2764 | return r; | |
2765 | ||
b9df3536 LP |
2766 | r = make_filesystem(fsdev, p->format, p->new_label, fs_uuid, arg_discard); |
2767 | if (r < 0) { | |
2768 | encrypted_dev_fd = safe_close(encrypted_dev_fd); | |
2769 | (void) deactivate_luks(cd, encrypted); | |
53171c04 | 2770 | return r; |
b9df3536 | 2771 | } |
53171c04 LP |
2772 | |
2773 | log_info("Successfully formatted future partition %" PRIu64 ".", p->partno); | |
2774 | ||
b9df3536 LP |
2775 | /* The file system is now created, no need to delay udev further */ |
2776 | if (p->encrypt) | |
2777 | if (flock(encrypted_dev_fd, LOCK_UN) < 0) | |
2778 | return log_error_errno(errno, "Failed to unlock LUKS device: %m"); | |
2779 | ||
2780 | r = partition_copy_files(p, fsdev); | |
2781 | if (r < 0) { | |
2782 | encrypted_dev_fd = safe_close(encrypted_dev_fd); | |
2783 | (void) deactivate_luks(cd, encrypted); | |
8a794850 | 2784 | return r; |
b9df3536 LP |
2785 | } |
2786 | ||
2787 | /* Note that we always sync explicitly here, since mkfs.fat doesn't do that on its own, and | |
2788 | * if we don't sync before detaching a block device the in-flight sectors possibly won't hit | |
2789 | * the disk. */ | |
2790 | ||
2791 | if (p->encrypt) { | |
2792 | if (fsync(encrypted_dev_fd) < 0) | |
2793 | return log_error_errno(r, "Failed to synchronize LUKS volume: %m"); | |
2794 | encrypted_dev_fd = safe_close(encrypted_dev_fd); | |
2795 | ||
2796 | r = deactivate_luks(cd, encrypted); | |
2797 | if (r < 0) | |
2798 | return r; | |
2799 | ||
0d12936d | 2800 | sym_crypt_free(cd); |
b9df3536 LP |
2801 | cd = NULL; |
2802 | } | |
8a794850 | 2803 | |
53171c04 LP |
2804 | r = loop_device_sync(d); |
2805 | if (r < 0) | |
2806 | return log_error_errno(r, "Failed to sync loopback device: %m"); | |
2807 | } | |
2808 | ||
2809 | return 0; | |
2810 | } | |
2811 | ||
e594a3b1 LP |
2812 | static int partition_acquire_uuid(Context *context, Partition *p, sd_id128_t *ret) { |
2813 | struct { | |
2814 | sd_id128_t type_uuid; | |
2815 | uint64_t counter; | |
2816 | } _packed_ plaintext = {}; | |
2817 | union { | |
2818 | unsigned char md[SHA256_DIGEST_LENGTH]; | |
2819 | sd_id128_t id; | |
2820 | } result; | |
2821 | ||
2822 | uint64_t k = 0; | |
2823 | Partition *q; | |
2824 | int r; | |
2825 | ||
2826 | assert(context); | |
2827 | assert(p); | |
2828 | assert(ret); | |
2829 | ||
2830 | /* Calculate a good UUID for the indicated partition. We want a certain degree of reproducibility, | |
2831 | * hence we won't generate the UUIDs randomly. Instead we use a cryptographic hash (precisely: | |
2832 | * HMAC-SHA256) to derive them from a single seed. The seed is generally the machine ID of the | |
2833 | * installation we are processing, but if random behaviour is desired can be random, too. We use the | |
2834 | * seed value as key for the HMAC (since the machine ID is something we generally don't want to leak) | |
2835 | * and the partition type as plaintext. The partition type is suffixed with a counter (only for the | |
2836 | * second and later partition of the same type) if we have more than one partition of the same | |
2837 | * time. Or in other words: | |
2838 | * | |
2839 | * With: | |
2840 | * SEED := /etc/machine-id | |
2841 | * | |
2842 | * If first partition instance of type TYPE_UUID: | |
2843 | * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID) | |
2844 | * | |
2845 | * For all later partition instances of type TYPE_UUID with INSTANCE being the LE64 encoded instance number: | |
2846 | * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID || INSTANCE) | |
2847 | */ | |
2848 | ||
2849 | LIST_FOREACH(partitions, q, context->partitions) { | |
2850 | if (p == q) | |
2851 | break; | |
2852 | ||
2853 | if (!sd_id128_equal(p->type_uuid, q->type_uuid)) | |
2854 | continue; | |
2855 | ||
2856 | k++; | |
2857 | } | |
2858 | ||
2859 | plaintext.type_uuid = p->type_uuid; | |
2860 | plaintext.counter = htole64(k); | |
2861 | ||
2862 | if (!HMAC(EVP_sha256(), | |
2863 | &context->seed, sizeof(context->seed), | |
2864 | (const unsigned char*) &plaintext, k == 0 ? sizeof(sd_id128_t) : sizeof(plaintext), | |
2865 | result.md, NULL)) | |
2866 | return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE), "SHA256 calculation failed."); | |
2867 | ||
2868 | /* Take the first half, mark it as v4 UUID */ | |
2869 | assert_cc(sizeof(result.md) == sizeof(result.id) * 2); | |
2870 | result.id = id128_make_v4_uuid(result.id); | |
2871 | ||
2872 | /* Ensure this partition UUID is actually unique, and there's no remaining partition from an earlier run? */ | |
2873 | LIST_FOREACH(partitions, q, context->partitions) { | |
2874 | if (p == q) | |
2875 | continue; | |
2876 | ||
2877 | if (sd_id128_equal(q->current_uuid, result.id) || | |
2878 | sd_id128_equal(q->new_uuid, result.id)) { | |
2879 | log_warning("Partition UUID calculated from seed for partition %" PRIu64 " exists already, reverting to randomized UUID.", p->partno); | |
2880 | ||
2881 | r = sd_id128_randomize(&result.id); | |
2882 | if (r < 0) | |
2883 | return log_error_errno(r, "Failed to generate randomized UUID: %m"); | |
2884 | ||
2885 | break; | |
2886 | } | |
2887 | } | |
2888 | ||
2889 | *ret = result.id; | |
2890 | return 0; | |
2891 | } | |
2892 | ||
2893 | static int partition_acquire_label(Context *context, Partition *p, char **ret) { | |
2894 | _cleanup_free_ char *label = NULL; | |
2895 | const char *prefix; | |
2896 | unsigned k = 1; | |
2897 | ||
2898 | assert(context); | |
2899 | assert(p); | |
2900 | assert(ret); | |
2901 | ||
2902 | prefix = gpt_partition_type_uuid_to_string(p->type_uuid); | |
2903 | if (!prefix) | |
2904 | prefix = "linux"; | |
2905 | ||
2906 | for (;;) { | |
2907 | const char *ll = label ?: prefix; | |
2908 | bool retry = false; | |
2909 | Partition *q; | |
2910 | ||
2911 | LIST_FOREACH(partitions, q, context->partitions) { | |
2912 | if (p == q) | |
2913 | break; | |
2914 | ||
2915 | if (streq_ptr(ll, q->current_label) || | |
2916 | streq_ptr(ll, q->new_label)) { | |
2917 | retry = true; | |
2918 | break; | |
2919 | } | |
2920 | } | |
2921 | ||
2922 | if (!retry) | |
2923 | break; | |
2924 | ||
2925 | label = mfree(label); | |
2926 | ||
2927 | ||
2928 | if (asprintf(&label, "%s-%u", prefix, ++k) < 0) | |
2929 | return log_oom(); | |
2930 | } | |
2931 | ||
2932 | if (!label) { | |
2933 | label = strdup(prefix); | |
2934 | if (!label) | |
2935 | return log_oom(); | |
2936 | } | |
2937 | ||
2938 | *ret = TAKE_PTR(label); | |
2939 | return 0; | |
2940 | } | |
2941 | ||
2942 | static int context_acquire_partition_uuids_and_labels(Context *context) { | |
2943 | Partition *p; | |
2944 | int r; | |
2945 | ||
2946 | assert(context); | |
2947 | ||
2948 | LIST_FOREACH(partitions, p, context->partitions) { | |
e594a3b1 LP |
2949 | /* Never touch foreign partitions */ |
2950 | if (PARTITION_IS_FOREIGN(p)) { | |
2951 | p->new_uuid = p->current_uuid; | |
2952 | ||
2953 | if (p->current_label) { | |
12963533 | 2954 | free(p->new_label); |
e594a3b1 LP |
2955 | p->new_label = strdup(p->current_label); |
2956 | if (!p->new_label) | |
2957 | return log_oom(); | |
2958 | } | |
2959 | ||
2960 | continue; | |
2961 | } | |
2962 | ||
2963 | if (!sd_id128_is_null(p->current_uuid)) | |
2964 | p->new_uuid = p->current_uuid; /* Never change initialized UUIDs */ | |
12963533 TH |
2965 | else if (sd_id128_is_null(p->new_uuid)) { |
2966 | /* Not explicitly set by user! */ | |
e594a3b1 LP |
2967 | r = partition_acquire_uuid(context, p, &p->new_uuid); |
2968 | if (r < 0) | |
2969 | return r; | |
2970 | } | |
2971 | ||
2972 | if (!isempty(p->current_label)) { | |
12963533 | 2973 | free(p->new_label); |
e594a3b1 LP |
2974 | p->new_label = strdup(p->current_label); /* never change initialized labels */ |
2975 | if (!p->new_label) | |
2976 | return log_oom(); | |
12963533 TH |
2977 | } else if (!p->new_label) { |
2978 | /* Not explicitly set by user! */ | |
2979 | ||
e594a3b1 LP |
2980 | r = partition_acquire_label(context, p, &p->new_label); |
2981 | if (r < 0) | |
2982 | return r; | |
2983 | } | |
2984 | } | |
2985 | ||
2986 | return 0; | |
2987 | } | |
2988 | ||
f28d4f42 | 2989 | static int context_mangle_partitions(Context *context) { |
e594a3b1 | 2990 | Partition *p; |
f28d4f42 | 2991 | int r; |
e594a3b1 LP |
2992 | |
2993 | assert(context); | |
2994 | ||
e594a3b1 LP |
2995 | LIST_FOREACH(partitions, p, context->partitions) { |
2996 | if (p->dropped) | |
2997 | continue; | |
2998 | ||
2999 | assert(p->new_size != UINT64_MAX); | |
3000 | assert(p->offset != UINT64_MAX); | |
3001 | assert(p->partno != UINT64_MAX); | |
3002 | ||
3003 | if (PARTITION_EXISTS(p)) { | |
3004 | bool changed = false; | |
3005 | ||
3006 | assert(p->current_partition); | |
3007 | ||
3008 | if (p->new_size != p->current_size) { | |
3009 | assert(p->new_size >= p->current_size); | |
3010 | assert(p->new_size % 512 == 0); | |
3011 | ||
3012 | r = fdisk_partition_size_explicit(p->current_partition, true); | |
3013 | if (r < 0) | |
3014 | return log_error_errno(r, "Failed to enable explicit sizing: %m"); | |
3015 | ||
3016 | r = fdisk_partition_set_size(p->current_partition, p->new_size / 512); | |
3017 | if (r < 0) | |
3018 | return log_error_errno(r, "Failed to grow partition: %m"); | |
3019 | ||
3020 | log_info("Growing existing partition %" PRIu64 ".", p->partno); | |
3021 | changed = true; | |
3022 | } | |
3023 | ||
3024 | if (!sd_id128_equal(p->new_uuid, p->current_uuid)) { | |
3025 | char buf[ID128_UUID_STRING_MAX]; | |
3026 | ||
3027 | assert(!sd_id128_is_null(p->new_uuid)); | |
3028 | ||
3029 | r = fdisk_partition_set_uuid(p->current_partition, id128_to_uuid_string(p->new_uuid, buf)); | |
3030 | if (r < 0) | |
3031 | return log_error_errno(r, "Failed to set partition UUID: %m"); | |
3032 | ||
3033 | log_info("Initializing UUID of existing partition %" PRIu64 ".", p->partno); | |
3034 | changed = true; | |
3035 | } | |
3036 | ||
3037 | if (!streq_ptr(p->new_label, p->current_label)) { | |
3038 | assert(!isempty(p->new_label)); | |
3039 | ||
3040 | r = fdisk_partition_set_name(p->current_partition, p->new_label); | |
3041 | if (r < 0) | |
3042 | return log_error_errno(r, "Failed to set partition label: %m"); | |
3043 | ||
3044 | log_info("Setting partition label of existing partition %" PRIu64 ".", p->partno); | |
3045 | changed = true; | |
3046 | } | |
3047 | ||
3048 | if (changed) { | |
3049 | assert(!PARTITION_IS_FOREIGN(p)); /* never touch foreign partitions */ | |
3050 | ||
3051 | r = fdisk_set_partition(context->fdisk_context, p->partno, p->current_partition); | |
3052 | if (r < 0) | |
3053 | return log_error_errno(r, "Failed to update partition: %m"); | |
3054 | } | |
3055 | } else { | |
3056 | _cleanup_(fdisk_unref_partitionp) struct fdisk_partition *q = NULL; | |
3057 | _cleanup_(fdisk_unref_parttypep) struct fdisk_parttype *t = NULL; | |
3058 | char ids[ID128_UUID_STRING_MAX]; | |
3059 | ||
3060 | assert(!p->new_partition); | |
3061 | assert(p->offset % 512 == 0); | |
3062 | assert(p->new_size % 512 == 0); | |
3063 | assert(!sd_id128_is_null(p->new_uuid)); | |
3064 | assert(!isempty(p->new_label)); | |
3065 | ||
3066 | t = fdisk_new_parttype(); | |
3067 | if (!t) | |
3068 | return log_oom(); | |
3069 | ||
3070 | r = fdisk_parttype_set_typestr(t, id128_to_uuid_string(p->type_uuid, ids)); | |
3071 | if (r < 0) | |
3072 | return log_error_errno(r, "Failed to initialize partition type: %m"); | |
3073 | ||
3074 | q = fdisk_new_partition(); | |
3075 | if (!q) | |
3076 | return log_oom(); | |
3077 | ||
3078 | r = fdisk_partition_set_type(q, t); | |
3079 | if (r < 0) | |
3080 | return log_error_errno(r, "Failed to set partition type: %m"); | |
3081 | ||
3082 | r = fdisk_partition_size_explicit(q, true); | |
3083 | if (r < 0) | |
3084 | return log_error_errno(r, "Failed to enable explicit sizing: %m"); | |
3085 | ||
3086 | r = fdisk_partition_set_start(q, p->offset / 512); | |
3087 | if (r < 0) | |
3088 | return log_error_errno(r, "Failed to position partition: %m"); | |
3089 | ||
3090 | r = fdisk_partition_set_size(q, p->new_size / 512); | |
3091 | if (r < 0) | |
3092 | return log_error_errno(r, "Failed to grow partition: %m"); | |
3093 | ||
3094 | r = fdisk_partition_set_partno(q, p->partno); | |
3095 | if (r < 0) | |
3096 | return log_error_errno(r, "Failed to set partition number: %m"); | |
3097 | ||
3098 | r = fdisk_partition_set_uuid(q, id128_to_uuid_string(p->new_uuid, ids)); | |
3099 | if (r < 0) | |
3100 | return log_error_errno(r, "Failed to set partition UUID: %m"); | |
3101 | ||
3102 | r = fdisk_partition_set_name(q, p->new_label); | |
3103 | if (r < 0) | |
3104 | return log_error_errno(r, "Failed to set partition label: %m"); | |
3105 | ||
5b5109e2 | 3106 | log_info("Adding new partition %" PRIu64 " to partition table.", p->partno); |
e594a3b1 LP |
3107 | |
3108 | r = fdisk_add_partition(context->fdisk_context, q, NULL); | |
3109 | if (r < 0) | |
3110 | return log_error_errno(r, "Failed to add partition: %m"); | |
3111 | ||
3112 | assert(!p->new_partition); | |
3113 | p->new_partition = TAKE_PTR(q); | |
3114 | } | |
3115 | } | |
3116 | ||
f28d4f42 LP |
3117 | return 0; |
3118 | } | |
3119 | ||
3120 | static int context_write_partition_table( | |
3121 | Context *context, | |
3122 | const char *node, | |
3123 | bool from_scratch) { | |
3124 | ||
3125 | _cleanup_(fdisk_unref_tablep) struct fdisk_table *original_table = NULL; | |
3126 | int capable, r; | |
3127 | ||
3128 | assert(context); | |
3129 | ||
3130 | if (arg_pretty > 0 || | |
3131 | (arg_pretty < 0 && isatty(STDOUT_FILENO) > 0) || | |
3132 | arg_json) { | |
3133 | ||
3134 | (void) context_dump_partitions(context, node); | |
3135 | ||
3136 | putc('\n', stdout); | |
3137 | ||
3138 | if (!arg_json) | |
3139 | (void) context_dump_partition_bar(context, node); | |
3140 | putc('\n', stdout); | |
3141 | fflush(stdout); | |
3142 | } | |
3143 | ||
3144 | if (!from_scratch && !context_changed(context)) { | |
3145 | log_info("No changes."); | |
3146 | return 0; | |
3147 | } | |
3148 | ||
3149 | if (arg_dry_run) { | |
3150 | log_notice("Refusing to repartition, please re-run with --dry-run=no."); | |
3151 | return 0; | |
3152 | } | |
3153 | ||
3154 | log_info("Applying changes."); | |
3155 | ||
3156 | if (from_scratch) { | |
81873a6b LP |
3157 | r = context_wipe_range(context, 0, context->total); |
3158 | if (r < 0) | |
3159 | return r; | |
3160 | ||
3161 | log_info("Wiped block device."); | |
3162 | ||
f28d4f42 LP |
3163 | r = context_discard_range(context, 0, context->total); |
3164 | if (r == -EOPNOTSUPP) | |
5b5109e2 | 3165 | log_info("Storage does not support discard, not discarding entire block device data."); |
f28d4f42 LP |
3166 | else if (r < 0) |
3167 | return log_error_errno(r, "Failed to discard entire block device: %m"); | |
3168 | else if (r > 0) | |
3169 | log_info("Discarded entire block device."); | |
3170 | } | |
3171 | ||
3172 | r = fdisk_get_partitions(context->fdisk_context, &original_table); | |
3173 | if (r < 0) | |
3174 | return log_error_errno(r, "Failed to acquire partition table: %m"); | |
3175 | ||
3176 | /* Wipe fs signatures and discard sectors where the new partitions are going to be placed and in the | |
3177 | * gaps between partitions, just to be sure. */ | |
3178 | r = context_wipe_and_discard(context, from_scratch); | |
3179 | if (r < 0) | |
3180 | return r; | |
3181 | ||
3182 | r = context_copy_blocks(context); | |
3183 | if (r < 0) | |
3184 | return r; | |
3185 | ||
3186 | r = context_mkfs(context); | |
3187 | if (r < 0) | |
3188 | return r; | |
3189 | ||
3190 | r = context_mangle_partitions(context); | |
3191 | if (r < 0) | |
3192 | return r; | |
3193 | ||
e594a3b1 LP |
3194 | log_info("Writing new partition table."); |
3195 | ||
3196 | r = fdisk_write_disklabel(context->fdisk_context); | |
3197 | if (r < 0) | |
3198 | return log_error_errno(r, "Failed to write partition table: %m"); | |
3199 | ||
911ba624 | 3200 | capable = blockdev_partscan_enabled(fdisk_get_devfd(context->fdisk_context)); |
9a1deb85 LP |
3201 | if (capable == -ENOTBLK) |
3202 | log_debug("Not telling kernel to reread partition table, since we are not operating on a block device."); | |
3203 | else if (capable < 0) | |
911ba624 | 3204 | return log_error_errno(capable, "Failed to check if block device supports partition scanning: %m"); |
9a1deb85 | 3205 | else if (capable > 0) { |
e594a3b1 LP |
3206 | log_info("Telling kernel to reread partition table."); |
3207 | ||
3208 | if (from_scratch) | |
3209 | r = fdisk_reread_partition_table(context->fdisk_context); | |
3210 | else | |
3211 | r = fdisk_reread_changes(context->fdisk_context, original_table); | |
3212 | if (r < 0) | |
3213 | return log_error_errno(r, "Failed to reread partition table: %m"); | |
3214 | } else | |
3215 | log_notice("Not telling kernel to reread partition table, because selected image does not support kernel partition block devices."); | |
3216 | ||
3217 | log_info("All done."); | |
3218 | ||
3219 | return 0; | |
3220 | } | |
3221 | ||
3222 | static int context_read_seed(Context *context, const char *root) { | |
3223 | int r; | |
3224 | ||
3225 | assert(context); | |
3226 | ||
3227 | if (!sd_id128_is_null(context->seed)) | |
3228 | return 0; | |
3229 | ||
3230 | if (!arg_randomize) { | |
3231 | _cleanup_close_ int fd = -1; | |
3232 | ||
3233 | fd = chase_symlinks_and_open("/etc/machine-id", root, CHASE_PREFIX_ROOT, O_RDONLY|O_CLOEXEC, NULL); | |
3234 | if (fd == -ENOENT) | |
3235 | log_info("No machine ID set, using randomized partition UUIDs."); | |
3236 | else if (fd < 0) | |
3237 | return log_error_errno(fd, "Failed to determine machine ID of image: %m"); | |
3238 | else { | |
448b782c | 3239 | r = id128_read_fd(fd, ID128_PLAIN_OR_UNINIT, &context->seed); |
e594a3b1 LP |
3240 | if (r == -ENOMEDIUM) |
3241 | log_info("No machine ID set, using randomized partition UUIDs."); | |
3242 | else if (r < 0) | |
3243 | return log_error_errno(r, "Failed to parse machine ID of image: %m"); | |
3244 | ||
3245 | return 0; | |
3246 | } | |
3247 | } | |
3248 | ||
3249 | r = sd_id128_randomize(&context->seed); | |
3250 | if (r < 0) | |
3251 | return log_error_errno(r, "Failed to generate randomized seed: %m"); | |
3252 | ||
3253 | return 0; | |
3254 | } | |
3255 | ||
3256 | static int context_factory_reset(Context *context, bool from_scratch) { | |
3257 | Partition *p; | |
3258 | size_t n = 0; | |
3259 | int r; | |
3260 | ||
3261 | assert(context); | |
3262 | ||
3263 | if (arg_factory_reset <= 0) | |
3264 | return 0; | |
3265 | ||
3266 | if (from_scratch) /* Nothing to reset if we start from scratch */ | |
3267 | return 0; | |
3268 | ||
3269 | if (arg_dry_run) { | |
3270 | log_notice("Refusing to factory reset, please re-run with --dry-run=no."); | |
3271 | return 0; | |
3272 | } | |
3273 | ||
3274 | log_info("Applying factory reset."); | |
3275 | ||
3276 | LIST_FOREACH(partitions, p, context->partitions) { | |
3277 | ||
3278 | if (!p->factory_reset || !PARTITION_EXISTS(p)) | |
3279 | continue; | |
3280 | ||
3281 | assert(p->partno != UINT64_MAX); | |
3282 | ||
3283 | log_info("Removing partition %" PRIu64 " for factory reset.", p->partno); | |
3284 | ||
3285 | r = fdisk_delete_partition(context->fdisk_context, p->partno); | |
3286 | if (r < 0) | |
3287 | return log_error_errno(r, "Failed to remove partition %" PRIu64 ": %m", p->partno); | |
3288 | ||
3289 | n++; | |
3290 | } | |
3291 | ||
3292 | if (n == 0) { | |
3293 | log_info("Factory reset requested, but no partitions to delete found."); | |
3294 | return 0; | |
3295 | } | |
3296 | ||
3297 | r = fdisk_write_disklabel(context->fdisk_context); | |
3298 | if (r < 0) | |
3299 | return log_error_errno(r, "Failed to write disk label: %m"); | |
3300 | ||
3301 | log_info("Successfully deleted %zu partitions.", n); | |
3302 | return 1; | |
3303 | } | |
3304 | ||
3305 | static int context_can_factory_reset(Context *context) { | |
3306 | Partition *p; | |
3307 | ||
3308 | assert(context); | |
3309 | ||
3310 | LIST_FOREACH(partitions, p, context->partitions) | |
3311 | if (p->factory_reset && PARTITION_EXISTS(p)) | |
3312 | return true; | |
3313 | ||
3314 | return false; | |
3315 | } | |
3316 | ||
757bc2e4 LP |
3317 | static int context_open_copy_block_paths(Context *context) { |
3318 | Partition *p; | |
3319 | int r; | |
3320 | ||
3321 | assert(context); | |
3322 | ||
3323 | LIST_FOREACH(partitions, p, context->partitions) { | |
3324 | _cleanup_close_ int source_fd = -1; | |
3325 | uint64_t size; | |
3326 | struct stat st; | |
3327 | ||
3328 | assert(p->copy_blocks_fd < 0); | |
3329 | assert(p->copy_blocks_size == UINT64_MAX); | |
3330 | ||
3331 | if (PARTITION_EXISTS(p)) /* Never copy over partitions that already exist! */ | |
3332 | continue; | |
3333 | ||
3334 | if (!p->copy_blocks_path) | |
3335 | continue; | |
3336 | ||
3337 | source_fd = open(p->copy_blocks_path, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
3338 | if (source_fd < 0) | |
3339 | return log_error_errno(errno, "Failed to open block copy file '%s': %m", p->copy_blocks_path); | |
3340 | ||
3341 | if (fstat(source_fd, &st) < 0) | |
3342 | return log_error_errno(errno, "Failed to stat block copy file '%s': %m", p->copy_blocks_path); | |
3343 | ||
3344 | if (S_ISDIR(st.st_mode)) { | |
3345 | _cleanup_free_ char *bdev = NULL; | |
3346 | ||
3347 | /* If the file is a directory, automatically find the backing block device */ | |
3348 | ||
3349 | if (major(st.st_dev) != 0) | |
3350 | r = device_path_make_major_minor(S_IFBLK, st.st_dev, &bdev); | |
3351 | else { | |
3352 | dev_t devt; | |
3353 | ||
3354 | /* Special support for btrfs */ | |
3355 | ||
3356 | r = btrfs_get_block_device_fd(source_fd, &devt); | |
67f0ac8c LP |
3357 | if (r == -EUCLEAN) |
3358 | return btrfs_log_dev_root(LOG_ERR, r, p->copy_blocks_path); | |
757bc2e4 LP |
3359 | if (r < 0) |
3360 | return log_error_errno(r, "Unable to determine backing block device of '%s': %m", p->copy_blocks_path); | |
3361 | ||
3362 | r = device_path_make_major_minor(S_IFBLK, devt, &bdev); | |
3363 | } | |
3364 | if (r < 0) | |
3365 | return log_error_errno(r, "Failed to determine block device path for block device backing '%s': %m", p->copy_blocks_path); | |
3366 | ||
3367 | safe_close(source_fd); | |
3368 | ||
3369 | source_fd = open(bdev, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
3370 | if (source_fd < 0) | |
3371 | return log_error_errno(errno, "Failed to open block device '%s': %m", bdev); | |
3372 | ||
3373 | if (fstat(source_fd, &st) < 0) | |
3374 | return log_error_errno(errno, "Failed to stat block device '%s': %m", bdev); | |
3375 | ||
3376 | if (!S_ISBLK(st.st_mode)) | |
3377 | return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK), "Block device '%s' is not actually a block device, refusing.", bdev); | |
3378 | } | |
3379 | ||
3380 | if (S_ISREG(st.st_mode)) | |
3381 | size = st.st_size; | |
3382 | else if (S_ISBLK(st.st_mode)) { | |
3383 | if (ioctl(source_fd, BLKGETSIZE64, &size) != 0) | |
3384 | return log_error_errno(errno, "Failed to determine size of block device to copy from: %m"); | |
3385 | } else | |
3386 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Specified path to copy blocks from '%s' is not a regular file, block device or directory, refusing: %m", p->copy_blocks_path); | |
3387 | ||
3388 | if (size <= 0) | |
3389 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File to copy bytes from '%s' has zero size, refusing.", p->copy_blocks_path); | |
3390 | if (size % 512 != 0) | |
3391 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File to copy bytes from '%s' has size that is not multiple of 512, refusing.", p->copy_blocks_path); | |
3392 | ||
3393 | p->copy_blocks_fd = TAKE_FD(source_fd); | |
3394 | p->copy_blocks_size = size; | |
3395 | } | |
3396 | ||
3397 | return 0; | |
3398 | } | |
3399 | ||
e594a3b1 LP |
3400 | static int help(void) { |
3401 | _cleanup_free_ char *link = NULL; | |
3402 | int r; | |
3403 | ||
3404 | r = terminal_urlify_man("systemd-repart", "1", &link); | |
3405 | if (r < 0) | |
3406 | return log_oom(); | |
3407 | ||
3408 | printf("%s [OPTIONS...] [DEVICE]\n" | |
3409 | "\n%sGrow and add partitions to partition table.%s\n\n" | |
3410 | " -h --help Show this help\n" | |
3411 | " --version Show package version\n" | |
3412 | " --dry-run=BOOL Whether to run dry-run operation\n" | |
a26f4a49 LP |
3413 | " --empty=MODE One of refuse, allow, require, force, create; controls\n" |
3414 | " how to handle empty disks lacking partition tables\n" | |
e594a3b1 | 3415 | " --discard=BOOL Whether to discard backing blocks for new partitions\n" |
2d2d0a57 | 3416 | " --pretty=BOOL Whether to show pretty summary before doing changes\n" |
e594a3b1 LP |
3417 | " --factory-reset=BOOL Whether to remove data partitions before recreating\n" |
3418 | " them\n" | |
3419 | " --can-factory-reset Test whether factory reset is defined\n" | |
3420 | " --root=PATH Operate relative to root path\n" | |
3421 | " --definitions=DIR Find partitions in specified directory\n" | |
b9df3536 | 3422 | " --key-file=PATH Key to use when encrypting partitions\n" |
e594a3b1 | 3423 | " --seed=UUID 128bit seed UUID to derive all UUIDs from\n" |
a26f4a49 | 3424 | " --size=BYTES Grow loopback file to specified size\n" |
2d2d0a57 | 3425 | " --json=pretty|short|off\n" |
de8231b0 | 3426 | " Generate JSON output\n" |
e594a3b1 LP |
3427 | "\nSee the %s for details.\n" |
3428 | , program_invocation_short_name | |
3429 | , ansi_highlight(), ansi_normal() | |
3430 | , link | |
3431 | ); | |
3432 | ||
3433 | return 0; | |
3434 | } | |
3435 | ||
3436 | static int parse_argv(int argc, char *argv[]) { | |
3437 | ||
3438 | enum { | |
3439 | ARG_VERSION = 0x100, | |
3440 | ARG_DRY_RUN, | |
3441 | ARG_EMPTY, | |
3442 | ARG_DISCARD, | |
3443 | ARG_FACTORY_RESET, | |
3444 | ARG_CAN_FACTORY_RESET, | |
3445 | ARG_ROOT, | |
3446 | ARG_SEED, | |
3447 | ARG_PRETTY, | |
3448 | ARG_DEFINITIONS, | |
a26f4a49 | 3449 | ARG_SIZE, |
a015fbe7 | 3450 | ARG_JSON, |
b9df3536 | 3451 | ARG_KEY_FILE, |
e594a3b1 LP |
3452 | }; |
3453 | ||
3454 | static const struct option options[] = { | |
3455 | { "help", no_argument, NULL, 'h' }, | |
3456 | { "version", no_argument, NULL, ARG_VERSION }, | |
3457 | { "dry-run", required_argument, NULL, ARG_DRY_RUN }, | |
3458 | { "empty", required_argument, NULL, ARG_EMPTY }, | |
3459 | { "discard", required_argument, NULL, ARG_DISCARD }, | |
3460 | { "factory-reset", required_argument, NULL, ARG_FACTORY_RESET }, | |
3461 | { "can-factory-reset", no_argument, NULL, ARG_CAN_FACTORY_RESET }, | |
3462 | { "root", required_argument, NULL, ARG_ROOT }, | |
3463 | { "seed", required_argument, NULL, ARG_SEED }, | |
3464 | { "pretty", required_argument, NULL, ARG_PRETTY }, | |
3465 | { "definitions", required_argument, NULL, ARG_DEFINITIONS }, | |
a26f4a49 | 3466 | { "size", required_argument, NULL, ARG_SIZE }, |
a015fbe7 | 3467 | { "json", required_argument, NULL, ARG_JSON }, |
b9df3536 | 3468 | { "key-file", required_argument, NULL, ARG_KEY_FILE }, |
e594a3b1 LP |
3469 | {} |
3470 | }; | |
3471 | ||
a26f4a49 | 3472 | int c, r, dry_run = -1; |
e594a3b1 LP |
3473 | |
3474 | assert(argc >= 0); | |
3475 | assert(argv); | |
3476 | ||
3477 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
3478 | ||
3479 | switch (c) { | |
3480 | ||
3481 | case 'h': | |
3482 | return help(); | |
3483 | ||
3484 | case ARG_VERSION: | |
3485 | return version(); | |
3486 | ||
3487 | case ARG_DRY_RUN: | |
3488 | r = parse_boolean(optarg); | |
3489 | if (r < 0) | |
3490 | return log_error_errno(r, "Failed to parse --dry-run= parameter: %s", optarg); | |
3491 | ||
a26f4a49 | 3492 | dry_run = r; |
e594a3b1 LP |
3493 | break; |
3494 | ||
3495 | case ARG_EMPTY: | |
3496 | if (isempty(optarg) || streq(optarg, "refuse")) | |
3497 | arg_empty = EMPTY_REFUSE; | |
3498 | else if (streq(optarg, "allow")) | |
3499 | arg_empty = EMPTY_ALLOW; | |
3500 | else if (streq(optarg, "require")) | |
3501 | arg_empty = EMPTY_REQUIRE; | |
3502 | else if (streq(optarg, "force")) | |
3503 | arg_empty = EMPTY_FORCE; | |
a26f4a49 LP |
3504 | else if (streq(optarg, "create")) { |
3505 | arg_empty = EMPTY_CREATE; | |
3506 | ||
3507 | if (dry_run < 0) | |
3508 | dry_run = false; /* Imply --dry-run=no if we create the loopback file | |
3509 | * anew. After all we cannot really break anyone's | |
3510 | * partition tables that way. */ | |
3511 | } else | |
e594a3b1 LP |
3512 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
3513 | "Failed to parse --empty= parameter: %s", optarg); | |
3514 | break; | |
3515 | ||
3516 | case ARG_DISCARD: | |
3517 | r = parse_boolean(optarg); | |
3518 | if (r < 0) | |
3519 | return log_error_errno(r, "Failed to parse --discard= parameter: %s", optarg); | |
3520 | ||
3521 | arg_discard = r; | |
3522 | break; | |
3523 | ||
3524 | case ARG_FACTORY_RESET: | |
3525 | r = parse_boolean(optarg); | |
3526 | if (r < 0) | |
3527 | return log_error_errno(r, "Failed to parse --factory-reset= parameter: %s", optarg); | |
3528 | ||
3529 | arg_factory_reset = r; | |
3530 | break; | |
3531 | ||
3532 | case ARG_CAN_FACTORY_RESET: | |
3533 | arg_can_factory_reset = true; | |
3534 | break; | |
3535 | ||
3536 | case ARG_ROOT: | |
3537 | r = parse_path_argument_and_warn(optarg, false, &arg_root); | |
3538 | if (r < 0) | |
3539 | return r; | |
3540 | break; | |
3541 | ||
3542 | case ARG_SEED: | |
3543 | if (isempty(optarg)) { | |
3544 | arg_seed = SD_ID128_NULL; | |
3545 | arg_randomize = false; | |
3546 | } else if (streq(optarg, "random")) | |
3547 | arg_randomize = true; | |
3548 | else { | |
3549 | r = sd_id128_from_string(optarg, &arg_seed); | |
3550 | if (r < 0) | |
3551 | return log_error_errno(r, "Failed to parse seed: %s", optarg); | |
3552 | ||
3553 | arg_randomize = false; | |
3554 | } | |
3555 | ||
3556 | break; | |
3557 | ||
3558 | case ARG_PRETTY: | |
3559 | r = parse_boolean(optarg); | |
3560 | if (r < 0) | |
3561 | return log_error_errno(r, "Failed to parse --pretty= parameter: %s", optarg); | |
3562 | ||
3563 | arg_pretty = r; | |
3564 | break; | |
3565 | ||
3566 | case ARG_DEFINITIONS: | |
3567 | r = parse_path_argument_and_warn(optarg, false, &arg_definitions); | |
3568 | if (r < 0) | |
3569 | return r; | |
3570 | break; | |
3571 | ||
a26f4a49 LP |
3572 | case ARG_SIZE: { |
3573 | uint64_t parsed, rounded; | |
3574 | ||
170c9823 LP |
3575 | if (streq(optarg, "auto")) { |
3576 | arg_size = UINT64_MAX; | |
3577 | arg_size_auto = true; | |
3578 | break; | |
3579 | } | |
3580 | ||
a26f4a49 LP |
3581 | r = parse_size(optarg, 1024, &parsed); |
3582 | if (r < 0) | |
3583 | return log_error_errno(r, "Failed to parse --size= parameter: %s", optarg); | |
3584 | ||
3585 | rounded = round_up_size(parsed, 4096); | |
3586 | if (rounded == 0) | |
3587 | return log_error_errno(SYNTHETIC_ERRNO(ERANGE), "Specified image size too small, refusing."); | |
3588 | if (rounded == UINT64_MAX) | |
3589 | return log_error_errno(SYNTHETIC_ERRNO(ERANGE), "Specified image size too large, refusing."); | |
3590 | ||
3591 | if (rounded != parsed) | |
3592 | log_warning("Specified size is not a multiple of 4096, rounding up automatically. (%" PRIu64 " → %" PRIu64 ")", | |
3593 | parsed, rounded); | |
3594 | ||
3595 | arg_size = rounded; | |
170c9823 | 3596 | arg_size_auto = false; |
a26f4a49 LP |
3597 | break; |
3598 | } | |
b9df3536 | 3599 | |
a015fbe7 TH |
3600 | case ARG_JSON: |
3601 | if (streq(optarg, "pretty")) { | |
3602 | arg_json = true; | |
3603 | arg_json_format_flags = JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO; | |
3604 | } else if (streq(optarg, "short")) { | |
3605 | arg_json = true; | |
3606 | arg_json_format_flags = JSON_FORMAT_NEWLINE; | |
3607 | } else if (streq(optarg, "off")) { | |
3608 | arg_json = false; | |
3609 | arg_json_format_flags = 0; | |
3610 | } else if (streq(optarg, "help")) { | |
3611 | puts("pretty\n" | |
3612 | "short\n" | |
3613 | "off"); | |
3614 | return 0; | |
3615 | } else | |
3616 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown argument to --json=: %s", optarg); | |
3617 | ||
3618 | break; | |
3619 | ||
b9df3536 LP |
3620 | case ARG_KEY_FILE: { |
3621 | _cleanup_(erase_and_freep) char *k = NULL; | |
3622 | size_t n = 0; | |
3623 | ||
8b3c3a49 | 3624 | r = read_full_file_full( |
986311c2 | 3625 | AT_FDCWD, optarg, UINT64_MAX, SIZE_MAX, |
8b3c3a49 LP |
3626 | READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET, |
3627 | NULL, | |
3628 | &k, &n); | |
b9df3536 LP |
3629 | if (r < 0) |
3630 | return log_error_errno(r, "Failed to read key file '%s': %m", optarg); | |
3631 | ||
3632 | erase_and_free(arg_key); | |
3633 | arg_key = TAKE_PTR(k); | |
3634 | arg_key_size = n; | |
3635 | break; | |
3636 | } | |
a26f4a49 | 3637 | |
e594a3b1 LP |
3638 | case '?': |
3639 | return -EINVAL; | |
3640 | ||
3641 | default: | |
3642 | assert_not_reached("Unhandled option"); | |
3643 | } | |
3644 | ||
3645 | if (argc - optind > 1) | |
3646 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
3647 | "Expected at most one argument, the path to the block device."); | |
3648 | ||
a26f4a49 | 3649 | if (arg_factory_reset > 0 && IN_SET(arg_empty, EMPTY_FORCE, EMPTY_REQUIRE, EMPTY_CREATE)) |
e594a3b1 | 3650 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
a26f4a49 | 3651 | "Combination of --factory-reset=yes and --empty=force/--empty=require/--empty=create is invalid."); |
e594a3b1 LP |
3652 | |
3653 | if (arg_can_factory_reset) | |
a26f4a49 LP |
3654 | arg_dry_run = true; /* When --can-factory-reset is specified we don't make changes, hence |
3655 | * non-dry-run mode makes no sense. Thus, imply dry run mode so that we | |
3656 | * open things strictly read-only. */ | |
3657 | else if (dry_run >= 0) | |
3658 | arg_dry_run = dry_run; | |
3659 | ||
170c9823 | 3660 | if (arg_empty == EMPTY_CREATE && (arg_size == UINT64_MAX && !arg_size_auto)) |
a26f4a49 LP |
3661 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
3662 | "If --empty=create is specified, --size= must be specified, too."); | |
e594a3b1 LP |
3663 | |
3664 | arg_node = argc > optind ? argv[optind] : NULL; | |
a26f4a49 LP |
3665 | |
3666 | if (IN_SET(arg_empty, EMPTY_FORCE, EMPTY_REQUIRE, EMPTY_CREATE) && !arg_node) | |
3667 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
3668 | "A path to a device node or loopback file must be specified when --empty=force, --empty=require or --empty=create are used."); | |
3669 | ||
e594a3b1 LP |
3670 | return 1; |
3671 | } | |
3672 | ||
3673 | static int parse_proc_cmdline_factory_reset(void) { | |
3674 | bool b; | |
3675 | int r; | |
3676 | ||
3677 | if (arg_factory_reset >= 0) /* Never override what is specified on the process command line */ | |
3678 | return 0; | |
3679 | ||
3680 | if (!in_initrd()) /* Never honour kernel command line factory reset request outside of the initrd */ | |
3681 | return 0; | |
3682 | ||
3683 | r = proc_cmdline_get_bool("systemd.factory_reset", &b); | |
3684 | if (r < 0) | |
3685 | return log_error_errno(r, "Failed to parse systemd.factory_reset kernel command line argument: %m"); | |
3686 | if (r > 0) { | |
3687 | arg_factory_reset = b; | |
3688 | ||
3689 | if (b) | |
3690 | log_notice("Honouring factory reset requested via kernel command line."); | |
3691 | } | |
3692 | ||
3693 | return 0; | |
3694 | } | |
3695 | ||
3696 | static int parse_efi_variable_factory_reset(void) { | |
3697 | _cleanup_free_ char *value = NULL; | |
3698 | int r; | |
3699 | ||
3700 | if (arg_factory_reset >= 0) /* Never override what is specified on the process command line */ | |
3701 | return 0; | |
3702 | ||
3703 | if (!in_initrd()) /* Never honour EFI variable factory reset request outside of the initrd */ | |
3704 | return 0; | |
3705 | ||
3706 | r = efi_get_variable_string(EFI_VENDOR_SYSTEMD, "FactoryReset", &value); | |
3707 | if (r == -ENOENT || ERRNO_IS_NOT_SUPPORTED(r)) | |
3708 | return 0; | |
3709 | if (r < 0) | |
3710 | return log_error_errno(r, "Failed to read EFI variable FactoryReset: %m"); | |
3711 | ||
3712 | r = parse_boolean(value); | |
3713 | if (r < 0) | |
3714 | return log_error_errno(r, "Failed to parse EFI variable FactoryReset: %m"); | |
3715 | ||
3716 | arg_factory_reset = r; | |
3717 | if (r) | |
3718 | log_notice("Honouring factory reset requested via EFI variable FactoryReset: %m"); | |
3719 | ||
3720 | return 0; | |
3721 | } | |
3722 | ||
3723 | static int remove_efi_variable_factory_reset(void) { | |
3724 | int r; | |
3725 | ||
3726 | r = efi_set_variable(EFI_VENDOR_SYSTEMD, "FactoryReset", NULL, 0); | |
3727 | if (r == -ENOENT || ERRNO_IS_NOT_SUPPORTED(r)) | |
3728 | return 0; | |
3729 | if (r < 0) | |
3730 | return log_error_errno(r, "Failed to remove EFI variable FactoryReset: %m"); | |
3731 | ||
3732 | log_info("Successfully unset EFI variable FactoryReset."); | |
3733 | return 0; | |
3734 | } | |
3735 | ||
a26f4a49 | 3736 | static int acquire_root_devno(const char *p, int mode, char **ret, int *ret_fd) { |
e594a3b1 LP |
3737 | _cleanup_close_ int fd = -1; |
3738 | struct stat st; | |
a26f4a49 | 3739 | dev_t devno, fd_devno = (mode_t) -1; |
e594a3b1 LP |
3740 | int r; |
3741 | ||
a26f4a49 LP |
3742 | assert(p); |
3743 | assert(ret); | |
3744 | assert(ret_fd); | |
3745 | ||
e594a3b1 LP |
3746 | fd = open(p, mode); |
3747 | if (fd < 0) | |
3748 | return -errno; | |
3749 | ||
3750 | if (fstat(fd, &st) < 0) | |
3751 | return -errno; | |
3752 | ||
3753 | if (S_ISREG(st.st_mode)) { | |
3754 | char *s; | |
3755 | ||
3756 | s = strdup(p); | |
3757 | if (!s) | |
3758 | return log_oom(); | |
3759 | ||
3760 | *ret = s; | |
a26f4a49 LP |
3761 | *ret_fd = TAKE_FD(fd); |
3762 | ||
e594a3b1 LP |
3763 | return 0; |
3764 | } | |
3765 | ||
3766 | if (S_ISBLK(st.st_mode)) | |
a26f4a49 | 3767 | fd_devno = devno = st.st_rdev; |
e594a3b1 LP |
3768 | else if (S_ISDIR(st.st_mode)) { |
3769 | ||
3770 | devno = st.st_dev; | |
a26f4a49 | 3771 | if (major(devno) == 0) { |
e594a3b1 LP |
3772 | r = btrfs_get_block_device_fd(fd, &devno); |
3773 | if (r == -ENOTTY) /* not btrfs */ | |
3774 | return -ENODEV; | |
3775 | if (r < 0) | |
3776 | return r; | |
3777 | } | |
e594a3b1 LP |
3778 | } else |
3779 | return -ENOTBLK; | |
3780 | ||
3781 | /* From dm-crypt to backing partition */ | |
3782 | r = block_get_originating(devno, &devno); | |
3783 | if (r < 0) | |
3784 | log_debug_errno(r, "Failed to find underlying block device for '%s', ignoring: %m", p); | |
3785 | ||
3786 | /* From partition to whole disk containing it */ | |
3787 | r = block_get_whole_disk(devno, &devno); | |
3788 | if (r < 0) | |
162392b7 | 3789 | log_debug_errno(r, "Failed to find whole disk block device for '%s', ignoring: %m", p); |
e594a3b1 | 3790 | |
a26f4a49 LP |
3791 | r = device_path_make_canonical(S_IFBLK, devno, ret); |
3792 | if (r < 0) | |
3793 | return log_debug_errno(r, "Failed to determine canonical path for '%s': %m", p); | |
3794 | ||
3795 | /* Only if we still lock at the same block device we can reuse the fd. Otherwise return an | |
3796 | * invalidated fd. */ | |
3797 | *ret_fd = fd_devno != (mode_t) -1 && fd_devno == devno ? TAKE_FD(fd) : -1; | |
3798 | return 0; | |
e594a3b1 LP |
3799 | } |
3800 | ||
a26f4a49 | 3801 | static int find_root(char **ret, int *ret_fd) { |
e594a3b1 LP |
3802 | const char *t; |
3803 | int r; | |
3804 | ||
a26f4a49 LP |
3805 | assert(ret); |
3806 | assert(ret_fd); | |
3807 | ||
e594a3b1 | 3808 | if (arg_node) { |
a26f4a49 LP |
3809 | if (arg_empty == EMPTY_CREATE) { |
3810 | _cleanup_close_ int fd = -1; | |
3811 | _cleanup_free_ char *s = NULL; | |
3812 | ||
3813 | s = strdup(arg_node); | |
3814 | if (!s) | |
3815 | return log_oom(); | |
3816 | ||
5332d7c6 | 3817 | fd = open(arg_node, O_RDONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOFOLLOW, 0666); |
a26f4a49 LP |
3818 | if (fd < 0) |
3819 | return log_error_errno(errno, "Failed to create '%s': %m", arg_node); | |
3820 | ||
3821 | *ret = TAKE_PTR(s); | |
3822 | *ret_fd = TAKE_FD(fd); | |
3823 | return 0; | |
3824 | } | |
3825 | ||
3826 | r = acquire_root_devno(arg_node, O_RDONLY|O_CLOEXEC, ret, ret_fd); | |
67f0ac8c LP |
3827 | if (r == -EUCLEAN) |
3828 | return btrfs_log_dev_root(LOG_ERR, r, arg_node); | |
e594a3b1 | 3829 | if (r < 0) |
aa2a74ad | 3830 | return log_error_errno(r, "Failed to open file or determine backing device of %s: %m", arg_node); |
e594a3b1 LP |
3831 | |
3832 | return 0; | |
3833 | } | |
3834 | ||
a26f4a49 LP |
3835 | assert(IN_SET(arg_empty, EMPTY_REFUSE, EMPTY_ALLOW)); |
3836 | ||
e594a3b1 LP |
3837 | /* Let's search for the root device. We look for two cases here: first in /, and then in /usr. The |
3838 | * latter we check for cases where / is a tmpfs and only /usr is an actual persistent block device | |
3839 | * (think: volatile setups) */ | |
3840 | ||
3841 | FOREACH_STRING(t, "/", "/usr") { | |
3842 | _cleanup_free_ char *j = NULL; | |
3843 | const char *p; | |
3844 | ||
3845 | if (in_initrd()) { | |
3846 | j = path_join("/sysroot", t); | |
3847 | if (!j) | |
3848 | return log_oom(); | |
3849 | ||
3850 | p = j; | |
3851 | } else | |
3852 | p = t; | |
3853 | ||
a26f4a49 | 3854 | r = acquire_root_devno(p, O_RDONLY|O_DIRECTORY|O_CLOEXEC, ret, ret_fd); |
e594a3b1 | 3855 | if (r < 0) { |
67f0ac8c LP |
3856 | if (r == -EUCLEAN) |
3857 | return btrfs_log_dev_root(LOG_ERR, r, p); | |
e594a3b1 LP |
3858 | if (r != -ENODEV) |
3859 | return log_error_errno(r, "Failed to determine backing device of %s: %m", p); | |
3860 | } else | |
3861 | return 0; | |
3862 | } | |
3863 | ||
3864 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "Failed to discover root block device."); | |
3865 | } | |
3866 | ||
a26f4a49 LP |
3867 | static int resize_backing_fd(const char *node, int *fd) { |
3868 | char buf1[FORMAT_BYTES_MAX], buf2[FORMAT_BYTES_MAX]; | |
3869 | _cleanup_close_ int writable_fd = -1; | |
3870 | struct stat st; | |
3871 | int r; | |
3872 | ||
3873 | assert(node); | |
3874 | assert(fd); | |
3875 | ||
3876 | if (arg_size == UINT64_MAX) /* Nothing to do */ | |
3877 | return 0; | |
3878 | ||
3879 | if (*fd < 0) { | |
3880 | /* Open the file if we haven't opened it yet. Note that we open it read-only here, just to | |
3881 | * keep a reference to the file we can pass around. */ | |
3882 | *fd = open(node, O_RDONLY|O_CLOEXEC); | |
3883 | if (*fd < 0) | |
3884 | return log_error_errno(errno, "Failed to open '%s' in order to adjust size: %m", node); | |
3885 | } | |
3886 | ||
3887 | if (fstat(*fd, &st) < 0) | |
3888 | return log_error_errno(errno, "Failed to stat '%s': %m", node); | |
3889 | ||
3890 | r = stat_verify_regular(&st); | |
3891 | if (r < 0) | |
3892 | return log_error_errno(r, "Specified path '%s' is not a regular file, cannot resize: %m", node); | |
3893 | ||
3894 | assert_se(format_bytes(buf1, sizeof(buf1), st.st_size)); | |
3895 | assert_se(format_bytes(buf2, sizeof(buf2), arg_size)); | |
3896 | ||
3897 | if ((uint64_t) st.st_size >= arg_size) { | |
3898 | log_info("File '%s' already is of requested size or larger, not growing. (%s >= %s)", node, buf1, buf2); | |
3899 | return 0; | |
3900 | } | |
3901 | ||
3902 | /* The file descriptor is read-only. In order to grow the file we need to have a writable fd. We | |
3903 | * reopen the file for that temporarily. We keep the writable fd only open for this operation though, | |
3904 | * as fdisk can't accept it anyway. */ | |
3905 | ||
3906 | writable_fd = fd_reopen(*fd, O_WRONLY|O_CLOEXEC); | |
3907 | if (writable_fd < 0) | |
3908 | return log_error_errno(writable_fd, "Failed to reopen backing file '%s' writable: %m", node); | |
3909 | ||
3910 | if (!arg_discard) { | |
3911 | if (fallocate(writable_fd, 0, 0, arg_size) < 0) { | |
3912 | if (!ERRNO_IS_NOT_SUPPORTED(errno)) | |
3913 | return log_error_errno(errno, "Failed to grow '%s' from %s to %s by allocation: %m", | |
3914 | node, buf1, buf2); | |
3915 | ||
3916 | /* Fallback to truncation, if fallocate() is not supported. */ | |
3917 | log_debug("Backing file system does not support fallocate(), falling back to ftruncate()."); | |
3918 | } else { | |
3919 | if (st.st_size == 0) /* Likely regular file just created by us */ | |
3920 | log_info("Allocated %s for '%s'.", buf2, node); | |
3921 | else | |
3922 | log_info("File '%s' grown from %s to %s by allocation.", node, buf1, buf2); | |
3923 | ||
3924 | return 1; | |
3925 | } | |
3926 | } | |
3927 | ||
3928 | if (ftruncate(writable_fd, arg_size) < 0) | |
3929 | return log_error_errno(errno, "Failed to grow '%s' from %s to %s by truncation: %m", | |
3930 | node, buf1, buf2); | |
3931 | ||
3932 | if (st.st_size == 0) /* Likely regular file just created by us */ | |
3933 | log_info("Sized '%s' to %s.", node, buf2); | |
3934 | else | |
3935 | log_info("File '%s' grown from %s to %s by truncation.", node, buf1, buf2); | |
3936 | ||
3937 | return 1; | |
3938 | } | |
3939 | ||
170c9823 LP |
3940 | static int determine_auto_size(Context *c) { |
3941 | uint64_t sum = round_up_size(GPT_METADATA_SIZE, 4096); | |
3942 | char buf[FORMAT_BYTES_MAX]; | |
3943 | Partition *p; | |
3944 | ||
3945 | assert_se(c); | |
3946 | assert_se(arg_size == UINT64_MAX); | |
3947 | assert_se(arg_size_auto); | |
3948 | ||
3949 | LIST_FOREACH(partitions, p, c->partitions) { | |
3950 | uint64_t m; | |
3951 | ||
3952 | if (p->dropped) | |
3953 | continue; | |
3954 | ||
3955 | m = partition_min_size_with_padding(p); | |
3956 | if (m > UINT64_MAX - sum) | |
3957 | return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "Image would grow too large, refusing."); | |
3958 | ||
3959 | sum += m; | |
3960 | } | |
3961 | ||
3962 | assert_se(format_bytes(buf, sizeof(buf), sum)); | |
3963 | log_info("Automatically determined minimal disk image size as %s.", buf); | |
3964 | ||
3965 | arg_size = sum; | |
3966 | return 0; | |
3967 | } | |
3968 | ||
e594a3b1 LP |
3969 | static int run(int argc, char *argv[]) { |
3970 | _cleanup_(context_freep) Context* context = NULL; | |
3971 | _cleanup_free_ char *node = NULL; | |
a26f4a49 | 3972 | _cleanup_close_ int backing_fd = -1; |
e594a3b1 LP |
3973 | bool from_scratch; |
3974 | int r; | |
3975 | ||
3976 | log_show_color(true); | |
3977 | log_parse_environment(); | |
3978 | log_open(); | |
3979 | ||
3980 | if (in_initrd()) { | |
3981 | /* Default to operation on /sysroot when invoked in the initrd! */ | |
3982 | arg_root = strdup("/sysroot"); | |
3983 | if (!arg_root) | |
3984 | return log_oom(); | |
3985 | } | |
3986 | ||
3987 | r = parse_argv(argc, argv); | |
3988 | if (r <= 0) | |
3989 | return r; | |
3990 | ||
3991 | r = parse_proc_cmdline_factory_reset(); | |
3992 | if (r < 0) | |
3993 | return r; | |
3994 | ||
3995 | r = parse_efi_variable_factory_reset(); | |
3996 | if (r < 0) | |
3997 | return r; | |
3998 | ||
e594a3b1 LP |
3999 | context = context_new(arg_seed); |
4000 | if (!context) | |
4001 | return log_oom(); | |
4002 | ||
4003 | r = context_read_definitions(context, arg_definitions, arg_root); | |
4004 | if (r < 0) | |
4005 | return r; | |
4006 | ||
a26f4a49 | 4007 | if (context->n_partitions <= 0 && arg_empty == EMPTY_REFUSE) { |
e2d65cd2 | 4008 | log_info("Didn't find any partition definition files, nothing to do."); |
0ae5ffe0 | 4009 | return 0; |
e2d65cd2 | 4010 | } |
0ae5ffe0 | 4011 | |
a26f4a49 | 4012 | r = find_root(&node, &backing_fd); |
0ae5ffe0 YW |
4013 | if (r < 0) |
4014 | return r; | |
4015 | ||
a26f4a49 LP |
4016 | if (arg_size != UINT64_MAX) { |
4017 | r = resize_backing_fd(node, &backing_fd); | |
4018 | if (r < 0) | |
4019 | return r; | |
4020 | } | |
4021 | ||
4022 | r = context_load_partition_table(context, node, &backing_fd); | |
e594a3b1 LP |
4023 | if (r == -EHWPOISON) |
4024 | return 77; /* Special return value which means "Not GPT, so not doing anything". This isn't | |
4025 | * really an error when called at boot. */ | |
4026 | if (r < 0) | |
4027 | return r; | |
4028 | from_scratch = r > 0; /* Starting from scratch */ | |
4029 | ||
4030 | if (arg_can_factory_reset) { | |
4031 | r = context_can_factory_reset(context); | |
4032 | if (r < 0) | |
4033 | return r; | |
4034 | if (r == 0) | |
4035 | return EXIT_FAILURE; | |
4036 | ||
4037 | return 0; | |
4038 | } | |
4039 | ||
4040 | r = context_factory_reset(context, from_scratch); | |
4041 | if (r < 0) | |
4042 | return r; | |
4043 | if (r > 0) { | |
4044 | /* We actually did a factory reset! */ | |
4045 | r = remove_efi_variable_factory_reset(); | |
4046 | if (r < 0) | |
4047 | return r; | |
4048 | ||
4049 | /* Reload the reduced partition table */ | |
4050 | context_unload_partition_table(context); | |
a26f4a49 | 4051 | r = context_load_partition_table(context, node, &backing_fd); |
e594a3b1 LP |
4052 | if (r < 0) |
4053 | return r; | |
4054 | } | |
4055 | ||
4056 | #if 0 | |
4057 | (void) context_dump_partitions(context, node); | |
4058 | putchar('\n'); | |
4059 | #endif | |
4060 | ||
4061 | r = context_read_seed(context, arg_root); | |
4062 | if (r < 0) | |
4063 | return r; | |
4064 | ||
757bc2e4 LP |
4065 | /* Open all files to copy blocks from now, since we want to take their size into consideration */ |
4066 | r = context_open_copy_block_paths(context); | |
4067 | if (r < 0) | |
4068 | return r; | |
4069 | ||
170c9823 LP |
4070 | if (arg_size_auto) { |
4071 | r = determine_auto_size(context); | |
4072 | if (r < 0) | |
4073 | return r; | |
4074 | ||
4075 | /* Flush out everything again, and let's grow the file first, then start fresh */ | |
4076 | context_unload_partition_table(context); | |
4077 | ||
4078 | assert_se(arg_size != UINT64_MAX); | |
4079 | r = resize_backing_fd(node, &backing_fd); | |
4080 | if (r < 0) | |
4081 | return r; | |
4082 | ||
4083 | r = context_load_partition_table(context, node, &backing_fd); | |
4084 | if (r < 0) | |
4085 | return r; | |
4086 | } | |
4087 | ||
e594a3b1 LP |
4088 | /* First try to fit new partitions in, dropping by priority until it fits */ |
4089 | for (;;) { | |
4090 | if (context_allocate_partitions(context)) | |
4091 | break; /* Success! */ | |
4092 | ||
4093 | if (!context_drop_one_priority(context)) | |
4094 | return log_error_errno(SYNTHETIC_ERRNO(ENOSPC), | |
4095 | "Can't fit requested partitions into free space, refusing."); | |
4096 | } | |
4097 | ||
4098 | /* Now assign free space according to the weight logic */ | |
4099 | r = context_grow_partitions(context); | |
4100 | if (r < 0) | |
4101 | return r; | |
4102 | ||
4103 | /* Now calculate where each partition gets placed */ | |
4104 | context_place_partitions(context); | |
4105 | ||
4106 | /* Make sure each partition has a unique UUID and unique label */ | |
4107 | r = context_acquire_partition_uuids_and_labels(context); | |
4108 | if (r < 0) | |
4109 | return r; | |
4110 | ||
4111 | r = context_write_partition_table(context, node, from_scratch); | |
4112 | if (r < 0) | |
4113 | return r; | |
4114 | ||
4115 | return 0; | |
4116 | } | |
4117 | ||
4118 | DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run); |